[Federal Register Volume 86, Number 215 (Wednesday, November 10, 2021)]
[Proposed Rules]
[Pages 62668-62705]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-24343]



[[Page 62667]]

Vol. 86

Wednesday,

No. 215

November 10, 2021

Part III





Department of the Interior





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Fish and Wildlife Service





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50 CFR Part 17





Endangered and Threatened Wildlife and Plants; Threatened Species 
Status With a Section 4(d) Rule for Bracted Twistflower and Designation 
of Critical Habitat; Proposed Rule

  Federal Register / Vol. 86, No. 215 / Wednesday, November 10, 2021 / 
Proposed Rules  

[[Page 62668]]


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DEPARTMENT OF THE INTERIOR

Fish and Wildlife Service

50 CFR Part 17

[Docket No. FWS-R2-ES-2021-0013; FF09E21000 FXES1111090FEDR 223]
RIN 1018-BE44


Endangered and Threatened Wildlife and Plants; Threatened Species 
Status With a Section 4(d) Rule for Bracted Twistflower and Designation 
of Critical Habitat

AGENCY: Fish and Wildlife Service, Interior.

ACTION: Proposed rule.

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SUMMARY: We, the U.S. Fish and Wildlife Service (Service), announce a 
12-month finding on a petition to list the bracted twistflower 
(Streptanthus bracteatus), a plant species from Texas, as a threatened 
species and designate critical habitat under the Endangered Species Act 
of 1973, as amended (Act). After a review of the best available 
scientific and commercial information, we find that listing the species 
is warranted. Accordingly, we propose to list bracted twistflower as a 
threatened species with a rule issued under section 4(d) of the Act (a 
``4(d) rule''). We also propose to designate critical habitat for the 
bracted twistflower under the Act. In total, approximately 1,606 acres 
(650 hectares) in Uvalde, Medina, Bexar, and Travis Counties in Texas 
fall within the boundaries of the proposed critical habitat 
designation. In addition, we announce the availability of a draft 
economic analysis (DEA) of the proposed designation of critical habitat 
for the bracted twistflower. If we finalize this rule as proposed, it 
would extend the Act's protections to this species and its critical 
habitat.

DATES: We will accept comments received or postmarked on or before 
January 10, 2022. Comments submitted electronically using the Federal 
eRulemaking Portal (see ADDRESSES, below) must be received by 11:59 
p.m. Eastern Time on the closing date. We must receive requests for a 
public hearing, in writing, at the address shown in FOR FURTHER 
INFORMATION CONTACT by December 27, 2021.

ADDRESSES: 
    Written comments: You may submit comments by one of the following 
methods:
    (1) Electronically: Go to the Federal eRulemaking Portal: http://www.regulations.gov. In the Search box, enter the docket number or RIN 
for this rulemaking (presented above in the document headings). For 
best results, do not copy and paste either number; instead, type the 
docket number or RIN into the Search box using hyphens. Then, click on 
the Search button. On the resulting page, in the Search panel on the 
left side of the screen, under the Document Type heading, check the 
Proposed Rule box to locate this document. You may submit a comment by 
clicking on ``Comment.''
    (2) By hard copy: Submit by U.S. mail to: Public Comments 
Processing, Attn: FWS-R2-ES-2021-0013, U.S. Fish and Wildlife Service, 
MS: PRB/3W, 5275 Leesburg Pike, Falls Church, VA 22041-3803.
    We request that you send comments only by the methods described 
above. We will post all comments on http://www.regulations.gov. This 
generally means that we will post any personal information you provide 
us (see Information Requested, below, for more information).
    Availability of supporting materials: For the critical habitat 
designation, the coordinates or plot points or both from which the maps 
are generated are included in the decision file and are available at 
http://www.regulations.gov under Docket No. FWS-R2-ES-2021-0013, and at 
the Austin Ecological Services Field Office (see FOR FURTHER 
INFORMATION CONTACT). Any additional tools or supporting information 
that we may develop for the critical habitat designation will also be 
available at the Service website and Field Office set out above, and 
may also be included in the preamble and/or at http://www.regulations.gov.

FOR FURTHER INFORMATION CONTACT: Adam Zerrenner, Field Supervisor, U.S. 
Fish and Wildlife Service, Austin Ecological Services Field Office, 
10711 Burnet Road, Suite 200, Austin, TX 78758; telephone 512-490-0057. 
Persons who use a telecommunications device for the deaf (TDD) may call 
the Federal Relay Service at 800-877-8339.

SUPPLEMENTARY INFORMATION:

Executive Summary

    Why we need to publish a rule. Under the Act, if we determine that 
a species is an endangered or threatened species throughout all or a 
significant portion of its range, we are required to promptly publish a 
proposal in the Federal Register and make a determination on our 
proposal within 1 year. To the maximum extent prudent and determinable, 
we must designate critical habitat for any species that we determine to 
be an endangered or threatened species under the Act. Listing a species 
as an endangered or threatened species and designation of critical 
habitat can only be completed by issuing a rule.
    What this document does. We propose to list the bracted twistflower 
as a threatened species with a species-specific 4(d) rule under the 
Act. We also propose to designate critical habitat for the species.
    The basis for our action. Under section 4(a) of the Act, we may 
determine that a species is an endangered or threatened species because 
of any of the following five factors: (A) The present or threatened 
destruction, modification, or curtailment of its habitat or range; (B) 
overutilization for commercial, recreational, scientific, or 
educational purposes; (C) disease or predation; (D) the inadequacy of 
existing regulatory mechanisms; or (E) other natural or manmade factors 
affecting its continued existence. We have determined that the primary 
threats to the bracted twistflower are loss of habitat due to urban and 
residential development, changes in structure and composition of 
vegetation and wildfire frequency, and herbivory by dense populations 
of white-tailed deer (Odocoileus virginianus) and introduced ungulates.
    Section 4(a)(3) of the Act requires the Secretary of the Interior 
(Secretary) to designate critical habitat concurrent with listing to 
the maximum extent prudent and determinable. Section 3(5)(A) of the Act 
defines critical habitat as (i) the specific areas within the 
geographical area occupied by the species, at the time it is listed, on 
which are found those physical or biological features (I) essential to 
the conservation of the species and (II) which may require special 
management considerations or protections; and (ii) specific areas 
outside the geographical area occupied by the species at the time it is 
listed, upon a determination by the Secretary that such areas are 
essential for the conservation of the species. Section 4(b)(2) of the 
Act states that the Secretary must make the designation on the basis of 
the best scientific data available and after taking into consideration 
the economic impact, the impact on national security, and any other 
relevant impacts of specifying any particular area as critical habitat.

Information Requested

    We intend that any final action resulting from this proposed rule 
will be based on the best scientific and commercial data available and 
be as accurate and as effective as possible. Therefore, we request 
comments or information from other concerned governmental agencies, 
Native

[[Page 62669]]

American tribes, the scientific community, industry, or any other 
interested parties concerning this proposed rule.
    We particularly seek comments concerning:
    (1) The species' biology, range, and population trends, including:
    (a) Biological or ecological requirements of the species, including 
habitat requirements for feeding, breeding, and sheltering;
    (b) Genetics and taxonomy;
    (c) Historical and current range, including distribution patterns;
    (d) Historical and current population levels, and current and 
projected trends; and
    (e) Past and ongoing conservation measures for the species, its 
habitat, or both.
    (2) Factors that may affect the continued existence of the species, 
which may include habitat modification or destruction, overutilization, 
disease, predation, the inadequacy of existing regulatory mechanisms, 
or other natural or manmade factors.
    (3) Biological, commercial trade, or other relevant data concerning 
any threats (or lack thereof) to this species and existing regulations 
that may be addressing those threats.
    (4) Additional information concerning the historical and current 
status, range, distribution, and population size of this species, 
including the locations of any additional populations of this species.
    (5) Information on regulations that are necessary and advisable to 
provide for the conservation of the bracted twistflower and that the 
Service can consider in developing a 4(d) rule for the species. In 
particular, information concerning the extent to which we should 
include any of the section 9 prohibitions in the 4(d) rule or whether 
we should consider any additional exceptions from the prohibitions in 
the 4(d) rule.
    (6) The reasons why we should or should not designate habitat as 
``critical habitat'' under section 4 of the Act (16 U.S.C. 1531 et 
seq.), including information to inform the following factors that the 
regulations identify as reasons why designation of critical habitat may 
be not prudent:
    (a) The species is threatened by taking or other human activity and 
identification of critical habitat can be expected to increase the 
degree of such threat to the species;
    (b) The present or threatened destruction, modification, or 
curtailment of a species' habitat or range is not a threat to the 
species, or threats to the species' habitat stem solely from causes 
that cannot be addressed through management actions resulting from 
consultations under section 7(a)(2) of the Act;
    (c) Areas within the jurisdiction of the United States provide no 
more than negligible conservation value, if any, for a species 
occurring primarily outside the jurisdiction of the United States; or
    (d) No areas meet the definition of critical habitat.
    (7) Specific information on:
    (a) The amount and distribution of bracted twistflower habitat;
    (b) What areas, that were occupied at the time of listing and that 
contain the physical or biological features essential to the 
conservation of the species, should be included in the designation and 
why;
    (c) Any additional areas occurring within the range of the species 
[i.e., Travis, Medina, Uvalde, Bexar, Hays Counties] that should be 
included in the designation because they (1) are occupied at the time 
of listing and contain the physical or biological features that are 
essential to the conservation of the species and that may require 
special management considerations, or (2) are unoccupied at the time of 
listing and are essential for the conservation of the species;
    (d) Special management considerations or protection that may be 
needed in critical habitat areas we are proposing, including managing 
for the potential effects of climate change; and
    (e) What areas not occupied at the time of listing are essential 
for the conservation of the species. We particularly seek comments:
    (i) Regarding whether occupied areas are adequate for the 
conservation of the species;
    (ii) Providing specific information regarding whether or not 
unoccupied areas would, with reasonable certainty, contribute to the 
conservation of the species and contain at least one physical or 
biological feature essential to the conservation of the species.
    (iii) Explaining whether or not unoccupied areas fall within the 
definition of ``habitat'' at 50 CFR 424.02 and why.
    (8) Land use designations and current or planned activities in the 
subject areas and their possible impacts on proposed critical habitat.
    (9) Any probable economic, national security, or other relevant 
impacts of designating any area that may be included in the final 
designation, and the related benefits of including or excluding 
specific areas.
    (10) Information on the extent to which the description of probable 
economic impacts in the draft economic analysis is a reasonable 
estimate of the likely economic impacts.
    (11) Whether any specific areas we are proposing for critical 
habitat designation should be considered for exclusion under section 
4(b)(2) of the Act, and whether the benefits of potentially excluding 
any specific area outweigh the benefits of including that area under 
section 4(b)(2) of the Act. If you think we should exclude any 
additional areas, please provide credible information regarding the 
existence of a meaningful economic or other relevant impact supporting 
a benefit of exclusion.
    (12) Whether we could improve or modify our approach to designating 
critical habitat in any way to provide for greater public participation 
and understanding, or to better accommodate public concerns and 
comments.
    Please include sufficient information with your submission (such as 
scientific journal articles or other publications) to allow us to 
verify any scientific or commercial information you include.
    Please note that submissions merely stating support for, or 
opposition to, the action under consideration without providing 
supporting information, although noted, will not be considered in 
making a determination, as section 4(b)(1)(A) of the Act directs that 
determinations as to whether any species is an endangered or a 
threatened species must be made ``solely on the basis of the best 
scientific and commercial data available.''
    You may submit your comments and materials concerning this proposed 
rule by one of the methods listed in ADDRESSES. We request that you 
send comments only by the methods described in ADDRESSES.
    If you submit information via http://www.regulations.gov, your 
entire submission--including any personal identifying information--will 
be posted on the website. If your submission is made via a hardcopy 
that includes personal identifying information, you may request at the 
top of your document that we withhold this information from public 
review. However, we cannot guarantee that we will be able to do so. We 
will post all hardcopy submissions on http://www.regulations.gov.
    Comments and materials we receive, as well as supporting 
documentation we used in preparing this proposed rule, will be 
available for public inspection on http://www.regulations.gov.
    Because we will consider all comments and information we receive 
during the comment period, our final determinations may differ from 
this proposal. Based on the new information

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we receive (and any comments on that new information), we may conclude 
that the species is endangered instead of threatened, or we may 
conclude that the species does not warrant listing as either an 
endangered species or a threatened species. For critical habitat, our 
final designation may not include all areas proposed, may include some 
additional areas that meet the definition of critical habitat, and may 
exclude some areas if we find the benefits of exclusion outweigh the 
benefits of inclusion. In addition, we may change the parameters of the 
prohibitions or the exceptions to those prohibitions in the 4(d) rule 
if we conclude it is appropriate in light of comments and new 
information received. For example, we may expand the prohibitions to 
include prohibiting additional activities if we conclude that those 
additional activities are not compatible with conservation of the 
species. Conversely, we may establish additional exceptions to the 
prohibitions in the final rule if we conclude that the activities would 
facilitate or are compatible with the conservation and recovery of the 
species.

Public Hearing

    Section 4(b)(5) of the Act provides for a public hearing on this 
proposal, if requested. Requests must be received by the date specified 
in DATES. Such requests must be sent to the address shown in FOR 
FURTHER INFORMATION CONTACT. We will schedule a public hearing on this 
proposal, if requested, and announce the date, time, and place of the 
hearing, as well as how to obtain reasonable accommodations, in the 
Federal Register and local newspapers at least 15 days before the 
hearing. For the immediate future, we will provide these public 
hearings using webinars that will be announced on the Service's 
website, in addition to the Federal Register. The use of these virtual 
public hearings is consistent with our regulations at 50 CFR 
424.16(c)(3).

Previous Federal Actions

    In 1975, the Smithsonian Institution presented a report to Congress 
describing over 3,000 vascular plants considered endangered, 
threatened, or extinct in the United States, including the bracted 
twistflower. The Service published a notice on July 1, 1975 (40 FR 
27824), in which we announced that this report had been accepted as a 
petition under the terms of the Act, and that the taxa named in the 
report and notice were being reviewed for possible inclusion in the 
List of Endangered and Threatened Plants.
    On December 15, 1980, we classified the bracted twistflower as a 
Category 2 candidate for listing (45 FR 82480). We defined Category 2 
candidates as taxa for which information in the Service's possession 
indicated the probable appropriateness of listing as endangered or 
threatened, but for which sufficient information was not available to 
biologically support a proposed rule at the time. The species remained 
so designated in subsequent candidate notices of review (CNORs) (50 FR 
39526, September 27, 1985; 55 FR 6184, February 21, 1990; 58 FR 51144, 
September 30, 1993). In the February 28, 1996, CNOR (61 FR 7596), we 
discontinued the designation of Category 2 species as candidates; 
therefore, the bracted twistflower was no longer a candidate species.
    On October 26, 2011, we added bracted twistflower to the candidate 
list (76 FR 66370). Candidates are those fish, wildlife, and plants for 
which we have on file sufficient information on biological 
vulnerability and threats to support preparation of a listing proposal, 
but for which preparation and publication of a proposal is precluded by 
higher priority listing actions. Bracted twistflower was included in 
all subsequent annual CNORs with a listing priority number of 8, which 
reflects a species with threats that are ongoing and imminent (77 FR 
69994, November 21, 2012; 78 FR 70104, November 22, 2013; 79 FR 72450, 
December 5, 2014; 80 FR 80584, December 24, 2015; 81 FR 87246, December 
2, 2016; 84 FR 54732, October 10, 2019; 85 FR 73164, November 16, 
2020).
    On August 5, 2014, we received a petition to list the bracted 
twistflower. Because the species was already on our candidate list, we 
took no additional action on the petition.

Supporting Documents

    A species status assessment (SSA) team prepared an SSA report for 
the bracted twistflower. The SSA team was composed of Service 
biologists in consultation with other species experts. The SSA report 
represents a compilation of the best scientific and commercial data 
available concerning the status of the species, including the impacts 
of past, present, and future factors (both negative and beneficial) 
affecting the species. In accordance with our joint policy on peer 
review published in the Federal Register on July 1, 1994 (59 FR 34270), 
and our August 20, 2016, memorandum updating and clarifying the role of 
peer review of listing actions under the Act, we sought the expert 
opinions of six appropriate specialists regarding the SSA. We received 
one response. We also sent the SSA report to four partners, including 
scientists with expertise in local plant species, for review. We 
received review from four partners (Texas Parks and Wildlife 
Department, the City of Austin, the City of San Antonio, and Joint Base 
San Antonio).

I. Proposed Listing Determination

Background

    Bracted twistflower is an annual herbaceous plant in the mustard 
family (Brassicaceae) that occurs only along the southeastern edge of 
the Edwards Plateau of central Texas. There are currently 35 described 
species of Streptanthus. Bracted twistflower can be distinguished from 
most other members of this genus because the leaves borne on the flower 
stalk lack stems and all flower stems have a small modified leaf, 
called a bract, at their bases.
    Bracted twistflower habitats occur near the boundary between the 
Edwards or Devils River limestone formations and the Glen Rose 
limestone formation. Individual plants commonly occur near or under a 
canopy of Ashe juniper (Juniperus ashei), Texas live oak (Quercus 
fusiformis), Texas mountain laurel (Sophora secundiflora), Texas red 
oak (Quercus buckleyi), or other trees.
    The seeds germinate in response to fall and winter rainfall, 
forming basal rosettes, and the flower stalks emerge the following 
spring bearing showy, lavender-purple flowers. The seed capsules remain 
attached to the stalks during the summer as they mature and dehisce, 
releasing the seeds to be dispersed by gravity. The foliage withers as 
the fruits mature, and the plants die during the heat of summer. This 
species is primarily an outcrossing species; the leafcutter bee 
Megachile comata (family: Megachilidae) is known to be an effective 
pollinator. Because the seeds of bracted twistflower do not disperse 
far, gene flow for this species occurs mainly through pollination.
    Since 1989, populations of the bracted twistflower have been 
documented at 17 naturally occurring element occurrences (EOs) in five 
counties, as well as one experimental trial in Travis County (see Table 
1, below). We have adopted the EO standard to maintain consistency with 
the Texas Parks and Wildlife Department's Natural Diversity Database 
(TXNDD) and because the EOs used in the TXNDD are practical 
approximations of populations, based on the best available scientific 
information. Each EO may consist of one to many Source Features, which 
are specific locations where one or more

[[Page 62671]]

individuals have been observed one or more times.
    Bracted twistflower is an annual plant, and the numbers of 
individuals that germinate at the Source Features of each EO vary 
widely from year to year in response to weather patterns or other 
stimuli. Thus, the numbers observed in any single year are not useful 
measures of population size because they do not reveal the numbers of 
live, dormant seeds that persist in the soil seed reserve. The SSA 
report (Service 2021, appendix A) describes the method we used to 
estimate the potential population sizes of EOs, which we define as the 
largest numbers of individuals that have been observed at each Source 
Feature of each EO. We then used aerial imagery to determine whether 
the habitat of any Source Features had been destroyed by construction 
of roads, buildings, or other disturbance, and we calculated the 
estimated remaining potential population at each EO. For a complete 
descriptions of the analysis used, see the SSA report. Table 1 lists 
the total potential populations of each EO and the proportions of each 
that were reported from Source Features that were destroyed, partially 
destroyed, or are still intact. In summary, within the naturally-
occurring EOs, we determined that habitats and potential populations 
are completely intact at 11 EOs, partially destroyed at four EOs, and 
completely destroyed at two EOs. However, even where habitats are 
intact, populations may decline due to ungulate herbivory, juniper 
competition, or other factors. A thorough review of the taxonomy, life 
history, and ecology of the bracted twistflower is presented in the SSA 
report (Service 2021, entire).

Table 1--Bracted Twistflower Element Occurrences (EOs), Potential Population Sizes (Numbers of Individuals), and
                                       Habitat Statuses of Source Features
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                                       Total          Potential population by habitat status
                                     potential   ------------------------------------------------     Percent
      EO--site name; owner;        population of                                                     remaining
     representation area \1\        all source        Intact         Destroyed       Partially        intact
                                     features                                        destroyed
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2--Cat Mountain (Far West);                  866             123             112             631            14.2
 Private; NE....................
7--Ullrich Water Treatment Plant             493             493               0               0           100.0
 (Bee Creek Preserve); City of
 Austin; NE.....................
9--Mt. Bonnell/Mt. Bonnell City              919             237             433             249            25.8
 Park; Private/City of Austin;
 NE.............................
17--Barton Creek Wilderness                1,677           1,677               0               0           100.0
 Park; City of Austin (Balcones
 Canyonlands Preserve (BCP)); NE
21--Mesa-FM 2222; Private; NE...             330               0              70             260             0.0
26--Bright Leaf State Natural                 10              10               0               0           100.0
 Area (SNA); Austin Community
 Foundation; NE.................
32--Rough Hollow Ranch; Private;              40               0              40               0             0.0
 NE.............................
33 \2\--Vireo Preserve                       120  ..............  ..............  ..............  ..............
 (experimental reintroduction);
 City of Austin (BCP); NE.......
35--Valburn Drive/Bull Creek               1,041             343             644              54            32.9
 District Park; Private/City of
 Austin; NE.....................
36--Gus Fruh/Barton Creek                     29              29               0               0           100.0
 Greenbelt; City of Austin; NE..
xx \3\--Falls Ranch; Private; NE               6               6               0               0           100.0
8--E Medina Lake; Texas                    2,260             477             481           1,302            21.1
 Department of Transportation,
 Medina County, and private
 rights-of-way; C...............
18--Medina Lake; Private; C.....           1,254           1,254               0               0           100.0
23--Eisenhower City Park/Camp                190             190               0               0           100.0
 Bullis Military Training
 Reservation; City of San
 Antonio/Dept. of Defense; C....
25--Laurel Canyon (Bear Bluff);            2,000           2,000               0               0           100.0
 Private Limited Partnership
 with City of San Antonio
 conservation easement; C.......
31--Rancho Diana (undeveloped                958             958               0               0           100.0
 natural area); City of San
 Antonio; C.....................
10--Garner State Park; Texas                 686             686               0               0           100.0
 Parks and Wildlife Department;
 W..............................
24--Upper Long Canyon; Private;                5               5               0               0           100.0
 W..............................
----------------------------------------------------------------------------------------------------------------
\1\ Described under Species Needs, below. NE = northeast; C = central; W = west.
\2\ This experimental reintroduction is not one of the 17 naturally-occurring EOs.
\3\ This newly-discovered site does not yet have in EO ID or EO number in the TXNDD.

Regulatory and Analytical Framework

Regulatory Framework

    Section 4 of the Act (16 U.S.C. 1533) and its implementing 
regulations (50 CFR part 424) set forth the procedures for determining 
whether a species is an endangered species or a threatened species. The 
Act defines an endangered species as a species that is in danger of 
extinction throughout all or a significant portion of its range, and a 
threatened species as a species that is ``likely to become an 
endangered species within the foreseeable future throughout all or a 
significant portion of its range''. The Act requires that we determine 
whether any species is an endangered species or a threatened species 
because of any of the following factors:
    (A) The present or threatened destruction, modification, or 
curtailment of its habitat or range;
    (B) Overutilization for commercial, recreational, scientific, or 
educational purposes;
    (C) Disease or predation;
    (D) The inadequacy of existing regulatory mechanisms; or
    (E) Other natural or manmade factors affecting its continued 
existence.
    These factors represent broad categories of natural or human-caused 
actions or conditions that could have an effect on a species' continued 
existence. In evaluating these actions and

[[Page 62672]]

conditions, we look for those that may have a negative effect on 
individuals of the species, as well as other actions or conditions that 
may ameliorate any negative effects or may have positive effects.
    We use the term ``threat'' to refer in general to actions or 
conditions that are known to or are reasonably likely to negatively 
affect individuals of a species. The term ``threat'' includes actions 
or conditions that have a direct impact on individuals (direct 
impacts), as well as those that affect individuals through alteration 
of their habitat or required resources (stressors). The term ``threat'' 
may encompass--either together or separately--the source of the action 
or condition or the action or condition itself.
    However, the mere identification of any threat(s) does not 
necessarily mean that the species meets the statutory definition of an 
``endangered species'' or a ``threatened species.'' In determining 
whether a species meets either definition, we must evaluate all 
identified threats by considering the expected response by the species, 
and the effects of the threats--in light of those actions and 
conditions that will ameliorate the threats--on an individual, 
population, and species level. We evaluate each threat and its expected 
effects on the species, then analyze the cumulative effect of all of 
the threats on the species as a whole. We also consider the cumulative 
effect of the threats in light of those actions and conditions that 
will have positive effects on the species--such as any existing 
regulatory mechanisms or conservation efforts. The Secretary determines 
whether the species meets the definition of an ``endangered species'' 
or a ``threatened species'' only after conducting this cumulative 
analysis and describing the expected effect on the species now and in 
the foreseeable future.
    The Act does not define the term ``foreseeable future,'' which 
appears in the statutory definition of ``threatened species.'' Our 
implementing regulations at 50 CFR 424.11(d) set forth a framework for 
evaluating the foreseeable future on a case-by-case basis. The term 
``foreseeable future'' extends only so far into the future as the 
Service can reasonably determine that both the future threats and the 
species' responses to those threats are likely. In other words, the 
foreseeable future is the period of time in which we can make reliable 
predictions. ``Reliable'' does not mean ``certain''; it means 
sufficient to provide a reasonable degree of confidence in the 
prediction. Thus, a prediction is reliable if it is reasonable to 
depend on it when making decisions.
    It is not always possible or necessary to define foreseeable future 
as a particular number of years. Analysis of the foreseeable future 
uses the best scientific and commercial data available and should 
consider the timeframes applicable to the relevant threats and to the 
species' likely responses to those threats in view of its life-history 
characteristics. Data that are typically relevant to assessing the 
species' biological response include species-specific factors such as 
lifespan, reproductive rates or productivity, and other demographic 
factors.

Analytical Framework

    The SSA report (Service 2021, entire) documents the results of our 
comprehensive biological review of the best scientific and commercial 
data regarding the status of the species, including an assessment of 
the potential threats to the species. The SSA report does not represent 
a decision by the Service on whether the species should be proposed for 
listing as an endangered or threatened species under the Act. However, 
it does provide the scientific basis that informs our regulatory 
decisions, which involve the further application of standards within 
the Act and its implementing regulations and policies. The following is 
a summary of the key results and conclusions from the SSA report; the 
full SSA report can be found at Docket No. FWS-R2-ES-2021-0013 on 
http://www.regulations.gov.
    To assess bracted twistflower viability, we used the three 
conservation biology principles of resiliency, redundancy, and 
representation (Shaffer and Stein 2000, pp. 306-310). Briefly, 
resiliency supports the ability of the species to withstand 
environmental and demographic stochasticity (for example, wet or dry, 
warm or cold years), redundancy supports the ability of the species to 
withstand catastrophic events (for example, droughts, large pollution 
events), and representation supports the ability of the species to 
adapt over time to long-term changes in the environment (for example, 
climate changes). In general, the more resilient and redundant a 
species is and the more representation it has, the more likely it is to 
sustain populations over time, even under changing environmental 
conditions. Using these principles, we identified the species' 
ecological requirements for survival and reproduction at the 
individual, population, and species levels, and described the 
beneficial and risk factors influencing the species' viability.
    The SSA process can be categorized into three sequential stages. 
During the first stage, we evaluated the individual species' life-
history needs. The next stage involved an assessment of the historical 
and current condition of the species' demographics and habitat 
characteristics, including an explanation of how the species arrived at 
its current condition. The final stage of the SSA involved making 
predictions about the species' responses to positive and negative 
environmental and anthropogenic influences. Throughout all of these 
stages, we used the best available information to characterize 
viability as the ability of a species to sustain populations in the 
wild over time. We use this information to inform our regulatory 
decision.

Summary of Biological Status and Threats

    In this discussion, we review the biological condition of the 
species and its resources, and the factors that influence the species' 
current and future condition, in order to assess the species' overall 
viability and the risks to that viability. We analyze these factors 
both individually and cumulatively to determine the current condition 
of the species and project the future condition of the species under 
several plausible future scenarios.

Species Needs

Habitat Availability and Protection From Herbivory
    Bracted twistflower habitat occurs on karstic, porous limestones 
near the boundary of the Devils River or Edwards formations and Glen 
Rose formations in central Texas. These juniper-oak woodlands and 
shrublands experience hot, often dry summers and mild winters with 
bimodal (spring and fall) precipitation patterns. Optimal microsites 
for the bracted twistflower have less than 50 percent cover of woody 
plant canopy with the most robust plants growing in full sun (Fowler 
2010, pp. 10-12; Leonard 2010, pp. 30-32; Ramsey 2010, pp. 10-13, 20; 
Leonard and Van Auken 2013, pp. 276-285). However, in areas with dense 
populations of white-tailed deer and other herbivores, few individuals 
survive except where they are protected from herbivory by a cover of 
dense, spiny understory vegetation (McNeal 1989, p. 17; Damude and 
Poole 1990, pp. 29 -30; Poole et al. 2007, p. 470; Leonard 2010, p. 
63).
Reproduction
    Bracted twistflower is an annual species sustained through its 
reserve of

[[Page 62673]]

seeds in the soil. Thus, resilient populations must produce more viable 
seeds than they lose through germination, herbivory, and loss of 
viability. Individuals that have begun flowering are vulnerable to 
herbivory by white-tailed deer, squirrels, and other herbivores, 
including introduced ungulates; although robust plants may generate a 
new flower stalk after the first stalk is removed, the loss of 
resources likely reduces reproductive output and a decrease in 
resiliency.
    Bracted twistflower reproduces primarily by outcrossing between 
individuals that are not closely related; self-pollination produces 
only small amounts of seeds. Fertilization requires that two or more 
sexually compatible individuals are located within the forage range of 
native bee pollinators. The longevity of seed viability has not been 
determined, although at least some seeds remain viable in the soil for 
at least 7 years (Service 2021, p. 12). The known pollinators of 
bracted twistflower are leafcutter bees (Megachile spp.) (Dieringer 
(1991, pp. 341-343), which have an estimated forage range of 600 meters 
to 3 kilometers (0.37 to 1.86 miles) (Mitchell 1936, pp. 124-125; 
Gathmann and Tscharntke 2002, pp. 760-761; Greenleaf et al. 2007, p. 
593; Discover Life 2019); sweat bees (family Halictidae) may also be 
effective pollinators (Service 2021, p. 5), but due to their smaller 
size have correspondingly smaller forage ranges. Sexual reproduction 
also increases genetic diversity, and thus representation, which allows 
populations to be more likely to adapt and survive when confronted with 
new pathogens, competitors, and changing environmental conditions. For 
these reasons, successful reproduction likely requires clustering of 
genetically diverse individuals within habitats that also support 
leafcutter bees, sweat bees, and other native bee species.
    Fall and winter rainfall stimulate bracted twistflower seed 
germination; successive rainfall events that allow soil moisture to 
persist may have greater effect than one or two heavy rains. In 
addition to rain, other factors appear to stimulate germination, such 
as the removal of competing vegetation, and possibly fire during a 
previous season.
Minimum Viable Population Size
    Populations of bracted twistflower must be large enough to have a 
high probability of surviving a prescribed period of time. For example, 
Mace and Lande (1991, p. 151) propose that species or populations be 
classified as vulnerable when the probability of persisting 100 years 
is less than 90 percent. This metric of population resilience is called 
minimum viable population (MVP). We adapted the method published in 
Pavlik (1996, p. 137) to estimate an MVP for bracted twistflower of 
about 1,800 individuals. This estimate of MVP is based only on numbers 
of mature, flowering individuals because juveniles that die before they 
reproduce do not contribute to the effective population size or future 
genetic diversity.

Current Condition

    Our assessment of the current species viability of bracted 
twistflower is based on its resiliency, redundancy, and representation. 
We ranked the current conditions of bracted twistflower EOs as high, 
medium, low, or extirpated based on the following characteristics: The 
proportion of potential populations where habitat is intact (described 
above); the population sizes and trends (if known) in remaining intact 
habitats; genetic diversity and inbreeding coefficients (if known); and 
the current levels of monitoring, vegetation management, and protection 
from development, herbivores, and recreational impacts on the remaining 
intact habitats. The current condition of each EO is based upon the 
cumulative effects of these factors.
Resiliency
    Our review of the TXNDD EO records (TXNDD 2018) indicates that 
relatively large pulses of bracted twistflower plants emerge in 
specific areas (Source Features) during relatively few years, while 
during most years few or no plants emerge. This wide annual variation 
in germination makes it very difficult to determine the species' 
population sizes and demographic trends (Service 2021, pp. 22-23, 
appendix A). However, one indicator of the status of bracted 
twistflower populations is the condition of their habitats. We define 
potential population size as the maximum numbers observed in specific 
areas during ``pulse'' years, when optimal conditions stimulate the 
greatest amounts of seed germination, establishment, and survival to 
successful reproduction. Thus, our estimate of the species' status is 
based in part on the potential populations remaining in intact 
habitats. The potential total number of individuals at the 17 naturally 
occurring EOs observed since 1989 is 12,764 (not including 120 planted 
at the experimental population at EO 33). Since 1989, 14 percent of 
bracted twistflower habitat (a potential population of 1,780 plants) 
has been completely destroyed in portions of six EOs; 19 percent of 
bracted twistflower habitat (a potential population of 2,496 plants) 
has been partially destroyed in portions of five EOs; and 67 percent (a 
potential population of 8,488 plants) remains intact in portions of 15 
naturally occurring EOs (note that each EO can have intact, partially 
destroyed, and destroyed portions, so the total is greater than the 
number of EOs). Nevertheless, this estimate reflects only the losses 
due to habitat development, and does not account for populations that 
may have declined due to excessive herbivory or juniper competition.
    Only four of the remaining EOs have potential populations of at 
least 50 percent of the estimated MVP value of 1,800 individuals. These 
medium resilient populations are Barton Creek Greenbelt and Wilderness 
Park (EO 17) and Rancho Diana (EO 31), which are protected natural 
areas managed by the City of Austin and City of San Antonio, 
respectively; Laurel Canyon (EO 25) is protected from development and 
land use change through a City of San Antonio conservation easement; 
and landowners voluntarily conserve a portion of Medina Lake (EO 18). 
The City of Austin also protects Ullrich (EO 7) from development and 
land use change (Texas Parks and Wildlife Department 2018, p. 1), 
although the potential maximum population is about 27 percent of the 
estimated MVP level. Gus Fruh (EO 36) is small, but due to its 
proximity to EO 17 along Barton Creek, might be considered part of a 
Barton Creek metapopulation. Mt. Bonnell City Park (EO 9), Garner SP 
(EO 10), Eisenhower City Park (EO 23), Valburn/Bull Creek District Park 
(EO 35), and Falls Ranch (no EO number) are all currently far below the 
MVP level. Four EOs have been mostly lost to development: Cat Mountain 
(EO 2), East Medina (EO 8), Mt. Bonnell City Park, and Valburn/Bull 
Creek. Two EOs have been completely lost to development: Mesa (EO 21) 
and Rough Hollow (EO 32). No individuals have been seen in recent years 
at two additional EOs, Bright Leaf (EO 26) and Upper Long Canyon (EO 
24), nor at the experimental population at Vireo Preserve (EO 33). In 
summary, none of the EOs of bracted twistflower have reached the MVP 
level in the last decade, most have low resiliency, many have gradually 
declined over the years that they have been monitored, and six EOs have 
been extirpated or very nearly extirpated.
Redundancy and Representation
    Bracted twistflower currently possesses significant genetic 
diversity at the species level, but populations are genetically 
distinct and there is no gene

[[Page 62674]]

flow between most populations (Pepper 2010, p. 11). However, of the 10 
EOs assessed by Pepper, low levels of genetic diversity occurred in all 
or parts of four EOs (40 percent), and all or parts of five EOs (50 
percent) had high levels of inbreeding; low genetic diversity and 
inbreeding were more prevalent in smaller, more isolated populations 
(Pepper 2010, pp. 13, 15). Therefore, although the species still 
possesses adequate genetic and ecological representation, many of its 
populations are at risk, due to small population sizes, low levels of 
genetic diversity, lack of gene flow, and inbreeding.
    Representation areas are sectors of a species' geographic range 
where important constituents of its genetic and ecological diversity 
occur. The known EOs of bracted twistflower are clustered in three 
geographic areas separated from each other by 50 km (30 mi) or more. 
Slight differences in day length, solar elevation, temperature, and 
precipitation occur over the species' range from northeast to 
southwest. Austin has more moderate summer and winter temperatures, 40 
percent fewer days of freezing weather, and 40 percent greater annual 
rainfall, compared to Uvalde County. These climate differences also 
create variation in the structure and composition of associated 
vegetation. Pepper (2010, pp. 4, 15) identified major, distinct 
clusters of genetic diversity in Medina County and in the Austin area . 
Based on this genetic data and the geographic clustering of 
populations, we identified three representation areas in the 
northeastern, central, and western portions of the species' range 
(Service 2021, Figure 9).
    Two EOs are extirpated (EO 21 and EO 32), and five EOs have low 
condition ranks and negligible contributions to redundancy. The 
northeast representation area has six EOs with high or medium condition 
ranks, conferring an intermediate degree of population redundancy 
within this area. The central representation area also has intermediate 
redundancy, because it has four EOs with high- or medium- condition 
ranks. In the west representation area, only EO 10 has a medium 
condition rank, and no population pulses have been observed there in 
recent years. This representation area appears to have very low 
redundancy; however, few surveys have been conducted in that area, so 
undiscovered populations might still exist.
    In summary, bracted twistflower has four EOs with medium resiliency 
and no highly resilient EOs. Two representation areas have intermediate 
redundancy. Genetic representation at the species level is adequate, 
but 40 to 50 percent of EOs had low genetic diversity and high 
inbreeding, and inbreeding also occurred in three larger populations. 
The species has lost all or parts of six EOs and one-third of its 
potential population size over the last 30 years.

Risk Factors

    A primary driver of the bracted twistflower's status is habitat 
loss due to urban and residential land development (McNeal 1989, p. 17; 
Damude and Poole 1990, p. 51; Zippin 1997, p. 229; Fowler 2010, p. 2; 
Pepper 2010, p. 5). A number of cities, including Austin, San Marcos, 
New Braunfels, and San Antonio, were established along the Balcones 
Escarpment due to the prevalence of springs. This area, known as the 
Interstate 35 corridor, is one of the fastest-growing urban complexes 
in the United States. Urban development reduces the redundancy and 
representation of the bracted twistflower and has consumed all or most 
of the habitat at six EOs of the bracted twistflower.
    Habitat changes leading to lower sunlight intensity in the existing 
habitat are another threat to the bracted twistflower as growth and 
reproduction of the species, and thus resilience, increases with higher 
light intensity and duration (Fowler 2010, pp. 1-18; Leonard 2010, pp. 
1-86; Ramsey 2010, pp. 1-35; Leonard and Van Auken 2013, pp. 276-285). 
Bracted twistflower habitats have likely experienced a decline in the 
frequency of wildfire, which has allowed Ashe juniper and other woody 
plant cover to increase within most bracted twistflower populations 
(Bray 1904, pp. 14-15, 22-23; Fonteyn et al. 1988, p. 79; Fowler et al. 
2012, pp. 1518-1521). These increases in woody plant cover reduce the 
growth and reproduction of bracted twistflowers.
    Severe herbivory by white-tailed deer and introduced ungulates is a 
significant factor affecting the status of bracted twistflower 
throughout the species' range, except where populations are protected 
from deer by fencing or through intensive herd management (McNeal 1989, 
p. 17; Damude and Poole 1990, pp. 52-53; Dieringer 1991, p. 341; Zippin 
1997, pp. 39-197, 227; Leonard 2010, pp. 36-43; Fowler 2014, pp. 17, 
19). Herbivory is exacerbated by the extremely high deer densities in 
the Edwards Plateau of Texas (Zippin 1997, p. 227).
    Both permitted and unauthorized recreation affects the species' 
survival at several protected natural areas, as well as on private 
lands. Hiking and mountain bike trails have impacted the populations at 
Mt. Bonnell City Park, Barton Creek Preserve, Garner State Park, and 
Bull Creek Park through trampling of the herbaceous vegetation and 
severe soil erosion where trails cut directly through occupied habitat 
(McNeal 1989, p. 19; Fowler 2010, p. 2; Bracted Twistflower Working 
Group 2010, p. 3; Pepper 2010, pp. 5, 15, 17).
    Small, isolated populations are less resilient and more vulnerable 
to catastrophic losses caused by random fluctuations in recruitment or 
variations in rainfall or other environmental factors (Service 2016, p. 
20). Small populations are also less able to overwhelm herbivores to 
ensure replenishment of the soil seed reserve (Service 2021, p. 33). In 
addition to population size, it is likely that population density also 
influences population viability, because reproduction requires 
genetically compatible individuals to be clustered within the forage 
range of the native bee pollinators (Service 2021, p. 33). Small, 
reproductively isolated populations are also more susceptible to the 
loss of genetic diversity, genetic drift, and inbreeding (Barrett and 
Kohn 1991, pp. 3-30). This may reduce the ability of the species or 
population to resist pathogens and parasites, adapt to changing 
environmental conditions, or colonize new habitats. More than half of 
the EOs observed since 1989 are at risk due to the demographic 
consequences of small population sizes (significantly below the 
estimated MVP level of 1,800 individuals), and many of the remaining 
populations have very little genetic diversity and relatively high 
levels of inbreeding (Pepper 2010, pp. 13, 15). The species as a whole 
still possesses significant genetic diversity (Pepper 2010, pp. 4, 11, 
15), but several of the core reservoirs of the species' genetic 
diversity occur on private lands and may be lost to development.

Projections of the Species Future Viability

    The SSA projects viability during two future periods, from 2030 to 
2040 and from 2050 to 2074. We chose these time frames because they 
represent the likely minimum and maximum lengths of time that seeds 
could remain viable in the soil, and therefore the potential of 
declining EOs to recover from viable seeds in the soil seed reserve. 
Although we do not know the maximum length of time that bracted 
twistflower seeds can remain viable in the soil seed reserve, 
observations of the experimental population at Vireo Preserve reveal 
that at least some seeds are viable after seven

[[Page 62675]]

years. Beale's seed viability experiment, begun in 1879, found that 60 
percent of annual and biennial plant species still germinated after 15 
years in the soil; but by 35 and 50 years, viable seeds persisted for 
only 30 percent and 25 percent of the species, respectively (Telewski 
and Zeevart 2002, p. 1286). Based on the Vireo Preserve observations 
and the Beale experiment, it is likely that bracted twistflower EOs 
could be restored after 10 or even 20 years without replenishment. 
Conversely, it is also likely that the soil seed reserve would be 
completely depleted after 50 years.
    The projections of future viability also considered three different 
scenarios representing an improvement over current conditions, 
continuation of current trends, or deterioration beyond current 
conditions. These scenarios were based on seven components that 
influence this species' status and their cumulative effects on the 
species: The extent of conservation support, effects of regional 
development, survey results, documentation of the geographic range, 
effectiveness of habitat management, effectiveness of population 
management, and effects of climate changes. Table 2 summarizes the 
projected species viability during each of the two time frames and 
under each of the three scenarios. Under the ``improvement'' scenario, 
the number of EOs in high condition, currently 5, would increase to 10 
by 2030-2040 and to 13 by 2050-2074 leading to an increase in species' 
resiliency. In this scenario species' redundancy and representation 
remain stable. Under the ``continue'' scenario, the number of 
extirpated EOs would increase to four by 2030-2040 and to 10 by 2050-
2074 leading to a loss of redundancy. Both EOs in the West 
Representation Area would be extirpated by 2050-2074 leading to a 
reduction in species' representation. Conditions within 15 EOs would 
deteriorate under this scenario, leading to a reduction in species' 
resiliency. The ``deterioration'' scenario projects extirpation of 11 
and 15 EOs during these periods, respectively, leading to a significant 
reduction in species redundancy and representation. By 2050-2074 all 
EOs in the West Representation area would be extirpated with only two 
remaining in the Northeast Representation Area and one in the Central 
Representation Area. Under this scenario, species resiliency declines 
across all sites. For more information, see the bracted twistflower SSA 
report (Service 2021, pp. 51-66). These scenarios should not be 
interpreted as mutually exclusive. The components of the scenarios will 
interact independently; future viability will likely result from a 
combination of conditions analyzed in these scenarios. For example, 
conservation support and habitat management could be better than 
expected by 2050, but climate changes and regional growth could have 
more severe impacts than expected.

  Table 2--Projected Viabilities of Bracted Twistflower During Two Future Time Frames and Under Three Scenarios
----------------------------------------------------------------------------------------------------------------
                                                                              Future scenarios
                                                           -----------------------------------------------------
                                                               Improvement     Current trends     Deterioration
           EO No.                Current condition rank    ------------------     continue     -----------------
                                                                             ------------------
                                                               Period/rank       Period/rank       Period/rank
----------------------------------------------------------------------------------------------------------------
                                          Northeast Representation Area
----------------------------------------------------------------------------------------------------------------
2...........................  Low.........................  2030-2040: Low..  2030-2040: Low..  2030-2040:
                                                                                                 Extirpated.
                                                            2050-2074:        2050-2074:        2050-2074:
                                                             Medium            Extirpated.       Extirpated.
7...........................  High........................  2030-2040: High.  2030-2040: High.  2030-2040: Low.
                                                            2050-2074: High   2050-2074: High.  2050-2074: Low.
9...........................  Medium......................  2030-2040: High.  2030-2040: Low..  2030-2040:
                                                                                                 Extirpated.
                                                            2050-2074: High   2050-2074:        2050-2074:
                                                                               Extirpated.       Extirpated.
17..........................  High........................  2030-2040: High.  2030-2040: High.  2030-2040: Low.
                                                            2050-2074: High   2050-2074:        2050-2074: Low.
                                                                               Medium.
21..........................  Extirpated..................  2030-2040:        2030-2040:        2030-2040:
                                                             Extirpated.       Extirpated.       Extirpated.
                                                            2050-2074:        2050-2074:        2050-2074:
                                                             Extirpated        Extirpated.       Extirpated.
26..........................  Low.........................  2030-2040:        2030-2040:        2030-2040:
                                                             Medium.           Extirpated.       Extirpated.
                                                            2050-2074:        2050-2074:        2050-2074:
                                                             Medium            Extirpated.       Extirpated.
32..........................  Extirpated..................  2030-2040:        2030-2040:        2030-2040:
                                                             Medium.           Extirpated.       Extirpated.
                                                            2050-2074:        2050-2074:        2050-2074:
                                                             Medium            Extirpated.       Extirpated.
33..........................  Low.........................  2030-2040:        2030-2040:        2030-2040:
                                                             Medium.           Extirpated.       Extirpated.
                                                            2050-2074: High   2050-2074:        2050-2074:
                                                                               Extirpated.       Extirpated.
35..........................  Medium......................  2030-2040: High.  2030-2040: Low..  2030-2040: Low.
                                                            2050-2074: High   2050-2074: Low..  2050-2074:
                                                                                                 Extirpated.
36..........................  High........................  2030-2040: High.  2030-2040:        2030-2040: Low.
                                                                               Medium.
                                                            2050-2074: High   2050-2074: Low..  2050-2074:
                                                                                                 Extirpated.
xx \1\......................  Medium......................  2030-2040:        2030-2040: Low..  2030-2040:
                                                             Medium.                             Extirpated.
                                                            2050-2074: High   2050-2074:        2050-2074:
                                                                               Extirpated.       Extirpated.
----------------------------------------------------------------------------------------------------------------
                                           Central Representation Area
----------------------------------------------------------------------------------------------------------------
8...........................  Low.........................  2030-2040:        2030-2040: Low..  2030-2040:
                                                             Medium.                             Extirpated.
                                                                              2050-2074:        2050-2074:
                                                                               Extirpated.       Extirpated.
18..........................  Medium......................  2030-2040: High.  2030-2040:        2030-2040: Low.
                                                                               Medium.
                                                            2050-2074: High   2050-2074: Low..  2050-2074:
                                                                                                 Extirpated.
23..........................  Medium......................  2030-2040: High.  2030-2040: Low..  2030-2040:
                                                                                                 Extirpated.
                                                            2050-2074: High   2050-2074: Low..  2050-2074:
                                                                                                 Extirpated.
25..........................  High........................  2030-2040: High.  2030-2040:        2030-2040: Low.
                                                                               Medium.
                                                            2050-2074: High   2050-2074: Low..  2050-2074:
                                                                                                 Extirpated.
31..........................  High........................  2030-2040: High.  2030-2040: High.  2030-2040:
                                                                                                 Medium.
                                                            2050-2074: High   2050-2074: High.  2050-2074: Low.
----------------------------------------------------------------------------------------------------------------

[[Page 62676]]

 
                                            West Representation Area
----------------------------------------------------------------------------------------------------------------
10..........................  Medium......................  2030-2040: High.  2030-2040: Low..  2030-2040:
                                                                                                 Extirpated.
                                                            2050-2074: High   2050-2074:        2050-2074:
                                                                               Extirpated.       Extirpated.
24..........................  Low.........................  2030-2040:        2030-2040: Low..  2030-2040:
                                                             Medium.                             Extirpated.
                                                            2050-2074: High   2050-2074:        2050-2074:
                                                                               Extirpated.       Extirpated.
----------------------------------------------------------------------------------------------------------------
\1\ This newly-discovered site does not yet have in EO ID or EO number in the TXNDD.

    We note that, by using the SSA framework to guide our analysis of 
the scientific information documented in the SSA report, we have not 
only analyzed individual effects on the species, but we have also 
analyzed their potential cumulative effects. We incorporate the 
cumulative effects into our SSA analysis when we characterize the 
current and future condition of the species. To assess the current and 
future condition of the species, we undertake an iterative analysis 
that encompasses and incorporates the threats individually and then 
accumulates and evaluates the effects of all the factors that may be 
influencing the species, including threats and conservation efforts. 
Because the SSA framework considers not just the presence of the 
factors, but to what degree they collectively influence risk to the 
entire species, our assessment integrates the cumulative effects of the 
factors and replaces a standalone cumulative effects analysis.
Conservation Efforts
    Ten scientific investigations have been completed that contribute 
to our knowledge of the phenology, reproduction, habitats, ecology, 
population biology, and population genetics of bracted twistflower. The 
Bracted Twistflower Working Group, a consortium of federal, state, and 
local agencies, researchers, and conservation organizations, has met 
informally at least annually since 2000 and has worked actively to 
promote the conservation and recovery of this species. The Service, 
Texas Parks and Wildlife Department (TPWD), the City of Austin, Travis 
County, the Lower Colorado River Authority, and the Lady Bird Johnson 
Wildflower Center established a voluntary Memorandum of Agreement to 
protect, monitor, and restore bracted twistflower and its habitats on 
Balcones Canyonlands Preserve (BCP) tracts. Five extant EOs and one 
experimental population are protected through the agreement, including 
three of the five populations in a high current condition (Table 2). 
The City of San Antonio has actively protected and managed EOs at 
Eisenhower Park and Rancho Diana; the latter continues to be one of the 
largest remaining populations. The City of San Antonio and The Nature 
Conservancy own a conservation easement to protect 222 ha (549 ac) in 
Medina County for watershed conservation; this includes EO 25, which 
has one of the largest extant bracted twistflower populations. All or 
parts of 11 EOs are located on state or local conservation land.

Determination of the Bracted Twistflower's Status

    Section 4 of the Act (16 U.S.C. 1533) and its implementing 
regulations (50 CFR part 424) set forth the procedures for determining 
whether a species meets the definition of an ``endangered species'' or 
a ``threatened species.'' The Act defines an ``endangered species'' as 
a species that is in danger of extinction throughout all or a 
significant portion of its range, and a ``threatened species'' as a 
species that is likely to become an endangered species within the 
foreseeable future throughout all or a significant portion of its 
range. The Act requires that we determine whether a species meets the 
definition of endangered species or threatened species because of any 
of the following factors: (A) The present or threatened destruction, 
modification, or curtailment of its habitat or range; (B) 
Overutilization for commercial, recreational, scientific, or 
educational purposes; (C) Disease or predation; (D) The inadequacy of 
existing regulatory mechanisms; or (E) Other natural or manmade factors 
affecting its continued existence.

Status Throughout All of Its Range

    We have carefully assessed the best scientific and commercial 
information available regarding the past, present, and future threats 
and the cumulative effect of the threats under the section 4(a)(1) 
factors to the bracted twistflower.
    Bracted twistflower occurs in three geographically separate 
representation areas, which experience differing regional climate and 
biotic factors. Although threats are currently acting on the bracted 
twistflower throughout its range, 11 EOs were found to have high or 
medium resiliency for their current condition, and 11 EOs (including 
one experimental population) occur on protected, state- or locally-
owned conservation lands. Thus, after assessing the best available 
information, we conclude that the bracted twistflower is not currently 
in danger of extinction throughout all of its range. We therefore 
proceed with determining whether the bracted twistflower is likely to 
become endangered within the foreseeable future throughout all of its 
range.
    For the purpose of this determination, the foreseeable future is 50 
years, which corresponds to the climate projections used in the 
analysis. Under the ``current trends continue'' scenario, the number of 
extirpated EOs increases from two to 10. Under the ``declining'' 
scenario, 15 EOs will become extirpated, and the condition rank of the 
remaining three EOs will be low. Development, which results in the 
permanent loss of habitat, is the most significant threat to bracted 
twistflower, and this threat is expected to continue into the future. 
Habitats throughout the species' range have been degraded due to 
habitat modification and increased browsing pressure from white-tailed 
deer and introduced ungulates. Threats from habitat loss, habitat 
modification, increased herbivory, and loss of genetic diversity are 
cumulative and will likely result in further degradation without 
management intervention. There is no appreciable gene flow between 
populations (Pepper 2010, p. 11). Populations of bracted twistflower 
have declined and are expected to continue to decline into the future. 
Our analysis

[[Page 62677]]

of the species' current and future conditions show that the population 
and habitat factors used to determine the resiliency, representation, 
and redundancy of bracted twistflower are likely to continue to decline 
to the degree that the species is likely to become in danger of 
extinction within the foreseeable future throughout all of its range.

Status Throughout a Significant Portion of Its Range

    Under the Act and our implementing regulations, a species may 
warrant listing if it is in danger of extinction or likely to become so 
in the foreseeable future throughout all or a significant portion of 
its range. The court in Center for Biological Diversity v. Everson, 
2020 WL 437289 (D.D.C. Jan. 28, 2020) (Center for Biological 
Diversity), vacated the aspect of the Final Policy on Interpretation of 
the Phrase ``Significant Portion of Its Range'' in the Endangered 
Species Act's Definitions of ``Endangered Species'' and ``Threatened 
Species'' (79 FR 37578; July 1, 2014) that provided the Service does 
not undertake an analysis of significant portions of a species' range 
if the species warrants listing as threatened throughout all of its 
range. Therefore, we proceed to evaluating whether the species is 
endangered in a significant portion of its range--that is, whether 
there is any portion of the species' range for which both (1) the 
portion is significant, and (2) the species is in danger of extinction 
in that portion. Depending on the case, it might be more efficient for 
us to address the ``significance'' question or the ``status'' question 
first. We can choose to address either question first. Regardless of 
which question we address first, if we reach a negative answer with 
respect to the first question that we address, we do not need to 
evaluate the other question for that portion of the species' range.
    Following the court's holding in Center for Biological Diversity, 
we now consider whether there are any significant portions of the 
species' range where the species is in danger of extinction now (i.e., 
endangered). In undertaking this analysis for the bracted twistflower, 
we choose to address the status question first--we consider information 
pertaining to the geographic distribution of the species and the 
threats that the species faces to identify any portions of the range 
where the species is endangered.
    The statutory difference between an endangered species and a 
threatened species is the time frame in which the species becomes in 
danger of extinction; an endangered species is in danger of extinction 
now while a threatened species is not in danger of extinction now but 
is likely to become so in the foreseeable future. Thus, we reviewed the 
best scientific and commercial data available regarding the time 
horizon for the threats that are driving the bracted twistflower to 
warrant listing as a threatened species throughout all of its range. We 
considered whether the threats are geographically concentrated in any 
portion of the species' range in a way that would accelerate the time 
horizon for the species' exposure or response to the threats. We 
examined the following threats: Habitat loss to development (Factor A); 
changes in fire frequency and the composition and structure of 
vegetation (Factor A); excessive herbivory by white-tailed deer and 
other ungulates (Factor C); and demographic and genetic consequences of 
small, isolated populations (Factor E), including cumulative effects.
    All of the known threats are present throughout the bracted 
twistflower's range, but to different degrees in different areas. We 
identified the western portion of the species' range, consisting of two 
EOs in Uvalde County, and determined that there is a concentration of 
threats from browsing of white-tailed deer and other ungulates. These 
threats are not unique to this area, but are acting at greater 
intensity here (e.g., larger populations of white-tailed deer and other 
ungulates). One EO is fairly large in size and is in medium condition 
with a moderate level of genetic diversity. The other EO within Uvalde 
County only has data from one observation in 1997, which documented 
five plants, and is in low condition. Since the larger population in 
this portion is in medium condition, this portion is not currently in 
danger of extinction.
    Although some threats to the bracted twistflower are concentrated 
in Uvalde County, the best scientific and commercial data available 
does not indicate that the concentration of threats, or the species' 
responses to the concentration of threats, are likely to accelerate the 
time horizon in which the species becomes in danger of extinction in 
that portion of its range. As a result, the bracted twistflower is not 
in danger of extinction now within Uvalde County. Therefore, we 
determine, that the species is likely to become in danger of extinction 
within the foreseeable future throughout all of its range. This is 
consistent with the courts' holdings in Desert Survivors v. Department 
of the Interior, No. 16-cv-01165-JCS, 2018 WL 4053447 (N.D. Cal. Aug. 
24, 2018), and Center for Biological Diversity v. Jewell, 248 F. Supp. 
3d, 946, 959 (D. Ariz. 2017).

Determination of Status

    Our review of the best scientific and commercial data available 
indicates that bracted twistflower meets the Act's definition of a 
threatened species. Therefore, we propose to list the bracted 
twistflower as a threatened species in accordance with sections 3(20) 
and 4(a)(1) of the Act.

Available Conservation Measures

    Conservation measures provided to species listed as endangered or 
threatened species under the Act include recognition, recovery actions, 
requirements for Federal protection, and prohibitions against certain 
practices. Recognition through listing results in public awareness and 
conservation by Federal, State, Tribal, and local agencies; private 
organizations; and individuals. The Act encourages cooperation with the 
States and other countries and calls for recovery actions to be carried 
out for listed species. The protection required by Federal agencies and 
the prohibitions against certain activities are discussed, in part, 
below.
    The primary purpose of the Act is the conservation of endangered 
and threatened species and the ecosystems upon which they depend. The 
ultimate goal of such conservation efforts is the recovery of these 
listed species so that they no longer need the protective measures of 
the Act. Section 4(f) of the Act calls for the Service to develop and 
implement recovery plans for the conservation of endangered and 
threatened species. The recovery planning process involves the 
identification of actions that are necessary to halt or reverse the 
species' decline by addressing the threats to its survival and 
recovery. The goal of this process is to restore listed species to a 
point where they are secure, self-sustaining, and functioning 
components of their ecosystems.
    Recovery planning consists of preparing draft and final recovery 
plans, beginning with the development of a recovery outline and making 
it available to the public within 30 days of a final listing 
determination. The recovery outline guides the immediate implementation 
of urgent recovery actions and describes the process to be used to 
develop a recovery plan. Revisions of the plan may be done to address 
continuing or new threats to the species, as new substantive 
information becomes available. The recovery plan also identifies 
recovery criteria for review of when a species may be ready for 
reclassification from endangered to

[[Page 62678]]

threatened (``downlisting'') or removal from protected status 
(``delisting''), and methods for monitoring recovery progress. Recovery 
plans also establish a framework for agencies to coordinate their 
recovery efforts and provide estimates of the cost of implementing 
recovery tasks. Recovery teams (composed of species experts, Federal 
and State agencies, nongovernmental organizations, and stakeholders) 
are often established to develop recovery plans. When completed, the 
recovery outline, draft recovery plan, and the final recovery plan will 
be available on our website (http://www.fws.gov/endangered), or from 
our Austin Ecological Services Field Office (see FOR FURTHER 
INFORMATION CONTACT).
    Implementation of recovery actions generally requires the 
participation of a broad range of partners, including other Federal 
agencies, States, Tribes, nongovernmental organizations, businesses, 
and private landowners. Examples of recovery actions include habitat 
restoration (e.g., restoration of native vegetation), research, captive 
propagation and reintroduction, and outreach and education. The 
recovery of many listed species cannot be accomplished solely on 
Federal lands because their range may occur primarily or solely on non-
Federal lands. To achieve recovery of these species requires 
cooperative conservation efforts on private, State, and Tribal lands.
    If this species is listed, funding for recovery actions will be 
available from a variety of sources, including Federal budgets, State 
programs, and cost-share grants for non-Federal landowners, the 
academic community, and nongovernmental organizations. In addition, 
pursuant to section 6 of the Act, the State of Texas would be eligible 
for Federal funds to implement management actions that promote the 
protection or recovery of the bracted twistflower. Information on our 
grant programs that are available to aid species recovery can be found 
at: http://www.fws.gov/grants.
    Although the bracted twistflower is only proposed for listing under 
the Act at this time, please let us know if you are interested in 
participating in recovery efforts for this species. Additionally, we 
invite you to submit any new information on this species whenever it 
becomes available and any information you may have for recovery 
planning purposes (see FOR FURTHER INFORMATION CONTACT).
    Section 7(a) of the Act requires Federal agencies to evaluate their 
actions with respect to any species that is proposed or listed as an 
endangered or threatened species and with respect to its critical 
habitat, if any is designated. Regulations implementing this 
interagency cooperation provision of the Act are codified at 50 CFR 
part 402. Section 7(a)(4) of the Act requires Federal agencies to 
confer with the Service on any action that is likely to jeopardize the 
continued existence of a species proposed for listing or result in 
destruction or adverse modification of proposed critical habitat. If a 
species is listed subsequently, section 7(a)(2) of the Act requires 
Federal agencies to ensure that activities they authorize, fund, or 
carry out are not likely to jeopardize the continued existence of the 
species or destroy or adversely modify its critical habitat. If a 
Federal action may affect a listed species or its critical habitat, the 
responsible Federal agency must enter into consultation with the 
Service.
    Federal agency actions within the species' habitat that may require 
conference or consultation or both as described in the preceding 
paragraph include management and any other landscape-altering 
activities on Federal lands administered by the Federal Highways 
Administration, U.S.D.A. Natural Resources Conservation Service, U.S. 
Army Corps of Engineers, Department of Defense-Joint Base San Antonio, 
and Federal Emergency Management Agency.
    It is our policy, as published in the Federal Register on July 1, 
1994 (59 FR 34272), to identify to the maximum extent practicable at 
the time a species is listed, those activities that would or would not 
constitute a violation of section 9 of the Act. The intent of this 
policy is to increase public awareness of the effect of a proposed 
listing on proposed and ongoing activities within the range of the 
species proposed for listing. The discussion below regarding protecting 
regulations under section 4(d) complies with our policy.

II. Proposed Rule Issued Under Section 4(d) of the Act

Background

    Section 4(d) of the Act contains two sentences. The first sentence 
states that the Secretary shall issue such regulations as she deems 
necessary and advisable to provide for the conservation of species 
listed as threatened. The U.S. Supreme Court has noted that statutory 
language like ``necessary and advisable'' demonstrates a large degree 
of deference to the agency (see Webster v. Doe, 486 U.S. 592 (1988)). 
Conservation is defined in the Act to mean the use of all methods and 
procedures which are necessary to bring any endangered species or 
threatened species to the point at which the measures provided pursuant 
to the Act are no longer necessary. Additionally, the second sentence 
of section 4(d) of the Act states that the Secretary may by regulation 
prohibit with respect to any threatened species any act prohibited 
under section 9(a)(1), in the case of fish or wildlife, or section 
9(a)(2), in the case of plants. Thus, the combination of the two 
sentences of section 4(d) provides the Secretary with wide latitude of 
discretion to select and promulgate appropriate regulations tailored to 
the specific conservation needs of the threatened species. The second 
sentence grants particularly broad discretion to the Service when 
adopting the prohibitions under section 9.
    The courts have recognized the extent of the Secretary's discretion 
under this standard to develop rules that are appropriate for the 
conservation of a species. For example, courts have upheld rules 
developed under section 4(d) as a valid exercise of agency authority 
where they prohibited take of threatened wildlife, or include a limited 
taking prohibition (see Alsea Valley Alliance v. Lautenbacher, 2007 
U.S. Dist. Lexis 60203 (D. Or. 2007); Washington Environmental Council 
v. National Marine Fisheries Service, 2002 U.S. Dist. Lexis 5432 (W.D. 
Wash. 2002)). Courts have also upheld 4(d) rules that do not address 
all of the threats a species faces (see State of Louisiana v. Verity, 
853 F.2d 322 (5th Cir. 1988)). As noted in the legislative history when 
the Act was initially enacted, ``once an animal is on the threatened 
list, the Secretary has an almost infinite number of options available 
to him with regard to the permitted activities for those species. He 
may, for example, permit taking, but not importation of such species, 
or he may choose to forbid both taking and importation but allow the 
transportation of such species'' (H.R. Rep. No. 412, 93rd Cong., 1st 
Sess. 1973).
    Exercising this authority under section 4(d), we have developed a 
proposed rule that is designed to address the bracted twistflower's 
specific threats and conservation needs. Although the statute does not 
require us to make a ``necessary and advisable'' finding with respect 
to the adoption of specific prohibitions under section 9, we find that 
this rule as a whole satisfies the requirement in section 4(d) of the 
Act to issue regulations deemed necessary and advisable to provide for 
the conservation of the bracted twistflower. As discussed above under 
Summary of Biological Status and Threats, the Service has concluded 
that the bracted twistflower is likely to

[[Page 62679]]

become in danger of extinction within the foreseeable future primarily 
due to habitat loss due to urban and residential land development, 
increases in woody plant cover, severe herbivory, and small, isolated 
populations. The provisions of this proposed 4(d) rule would promote 
conservation of the bracted twistflower by encouraging management of 
the landscape in ways that meet both land management considerations and 
the conservation needs of the bracted twistflower. This proposed 4(d) 
rule would apply only if and when we make final the listing of the 
bracted twistflower as a threatened species.
    Section 7(a)(2) of the Act requires Federal agencies, including the 
Service, to ensure that any action they fund, authorize, or carry out 
is not likely to jeopardize the continued existence of any endangered 
species or threatened species or result in the destruction or adverse 
modification of designated critical habitat of such species. In 
addition, section 7(a)(4) of the Act requires Federal agencies to 
confer with the Service on any agency action which is likely to 
jeopardize the continued existence of any species proposed to be listed 
under the Act or result in the destruction or adverse modification of 
proposed critical habitat.
    If a Federal action may affect a listed species or its critical 
habitat, the responsible Federal agency (action agency) must enter into 
consultation with us. Examples of actions that are subject to the 
section 7 consultation process are actions on State, Tribal, local, or 
private lands that require a Federal permit (such as a permit from the 
U.S. Army Corps of Engineers under section 404 of the Clean Water Act 
(33 U.S.C. 1251 et seq.) or a permit from the Service under section 10 
of the Act) or that involve some other Federal action (such as funding 
from the Federal Highway Administration, Federal Aviation 
Administration, or the Federal Emergency Management Agency). Federal 
actions not affecting listed species or critical habitat--and actions 
on State, Tribal, local, or private lands that are not federally 
funded, authorized, or carried out by a Federal agency--do not require 
section 7 consultation.
    This obligation does not change in any way for a threatened species 
with a species-specific 4(d) rule. Actions that result in a 
determination by a Federal agency of ``not likely to adversely affect'' 
continue to require the Service's written concurrence and actions that 
are ``likely to adversely affect'' a species require formal 
consultation and the formulation of a biological opinion.

Provisions of the Proposed 4(d) Rule

    This proposed 4(d) rule would provide for the conservation of the 
bracted twistflower by prohibiting the following activities, except as 
otherwise authorized or permitted: Importing or exporting; certain acts 
related to removing, damaging, and destroying; delivering, receiving, 
transporting, or shipping in interstate or foreign commerce in the 
course of commercial activity; and selling or offering for sale in 
interstate or foreign commerce.
    As discussed above under Summary of Biological Status and Threats, 
habitat loss due to urban and residential land development (Factor A), 
increases in woody plant cover (Factor A), severe herbivory (Factor E), 
and small, isolated populations (Factor E) affect the status of the 
bracted twistflower. To protect the species from these threats, in 
addition to the protections that apply to Federal lands, the 4(d) rule 
would prohibit a person from removing, cutting, digging up, or damaging 
or destroying the species on non-Federal lands in knowing violation of 
any law or regulation of any State or in the course of any violation of 
a State criminal trespass law. As most populations of the bracted 
twistflower occur off Federal land, these protections in the 4(d) rule 
are key to its effectiveness. For example, any damage to the species on 
non-Federal land in violation of a Texas off-highway vehicle law would 
be prohibited by the 4(d) rule. Additionally, any damage incurred by 
the species due to criminal trespass on non-Federal lands would 
similarly violate the proposed 4(d) rule. As a whole, the proposed 4(d) 
rule would help in the efforts to recover the bracted twistflower by 
limiting specific actions that damage individual populations.
    We may issue permits to carry out otherwise prohibited activities, 
including those described above, involving threatened plants under 
certain circumstances. Regulations governing permits for threatened 
plants are codified at 50 CFR 17.72, which states that ``the Director 
may issue a permit authorizing any activity otherwise prohibited with 
regard to threatened species.'' That regulation also states, ``The 
permit shall be governed by the provisions of this section unless a 
special rule applicable to the plant is provided in sections 17.73 to 
17.78.'' We interpret that second sentence to mean that permits for 
threatened species are governed by the provisions of section 17.72 
unless a special rule, which we have defined to mean a species-specific 
4(d) rule, provides otherwise. We recently promulgated revisions to 
section 17.71 providing that section 17.71 will no longer apply to 
plants listed as threatened in the future. We did not intend for those 
revisions to limit or alter the applicability of the permitting 
provisions in section 17.72, or to require that every species-specific 
4(d) rule spell out any permitting provisions that apply to that 
species and species-specific 4(d) rule. To the contrary, we anticipate 
that permitting provisions would generally be similar or identical for 
most species, so applying the provisions of section 17.72 unless a 
species-specific 4(d) rule provides otherwise would likely avoid 
substantial duplication. Moreover, this interpretation brings section 
17.72 in line with the comparable provision for wildlife at 50 CFR 
17.32, in which the second sentence states, ``Such permit shall be 
governed by the provisions of this section unless a special rule 
applicable to the wildlife, appearing in sections 17.40 to 17.48, of 
this part provides otherwise.'' Under 50 CFR 17.12 with regard to 
threatened plants, a permit may be issued for the following purposes: 
For scientific purposes, to enhance propagation or survival, for 
economic hardship, for botanical or horticultural exhibition, for 
educational purposes, or for other purposes consistent with the 
purposes and policy of the Act. Additional statutory exemptions from 
the prohibitions are found in sections 9 and 10 of the Act.
    We recognize the special and unique relationship with our State 
natural resource agency partners in contributing to conservation of 
listed species. State agencies often possess scientific data and 
valuable expertise on the status and distribution of endangered, 
threatened, and candidate species of wildlife and plants. State 
agencies, because of their authorities and their close working 
relationships with local governments and landowners, are in a unique 
position to assist the Services in implementing all aspects of the Act. 
In this regard, section 6 of the Act provides that the Services shall 
cooperate to the maximum extent practicable with the States in carrying 
out programs authorized by the Act. Therefore, any qualified employee 
or agent of a State conservation agency that is a party to a 
cooperative agreement with the Service in accordance with section 6(c) 
of the Act, who is designated by his or her agency for such purposes, 
would be able to conduct activities designed to conserve the bracted 
twistflower that may result in otherwise prohibited activities without 
additional authorization.

[[Page 62680]]

    The Service recognizes the proposed 4(d) rule would allow 
beneficial and educational aspect of activities with seeds of 
cultivated plants, which generally enhance the propagation of the 
species, and therefore would satisfy permit requirements under the Act. 
The Service intends to monitor the interstate and foreign commerce and 
import and export of these specimens in a manner that will not inhibit 
such activities, providing the activities do not represent a threat to 
the survival of the species in the wild. In this regard, seeds of 
cultivated specimens would not be subject to the prohibitions above, 
provided that a statement that the seeds are of ``cultivated origin'' 
accompanies the seeds or their container.
    Propagation is currently taking place for the bracted twistflower 
and will continue to be an important recovery tool. This will include 
collecting seeds from wild populations, following Center for Plant 
Conservation guidelines and the USFWS-NMFS 2000 Policy Regarding 
Controlled Propagation of Species Listed Under the Endangered Species 
Act (65 FR 56916), and propagating them for seed increase, population 
augmentation, introduction, and research related to the species' 
recovery.
    Nothing in this proposed 4(d) rule would change in any way the 
recovery planning provisions of section 4(f) of the Act, the 
consultation requirements under section 7 of the Act, or the ability of 
the Service to enter into partnerships for the management and 
protection of the bracted twistflower. However, interagency cooperation 
may be further streamlined through planned programmatic consultations 
for the species between Federal agencies and the Service, where 
appropriate. We ask the public, particularly State agencies and other 
interested stakeholders that may be affected by the proposed 4(d) rule, 
to provide comments and suggestions regarding additional guidance and 
methods that the Service could provide or use, respectively, to 
streamline the implementation of this proposed 4(d) rule (see 
Information Requested, above).

III. Critical Habitat

Background

    Critical habitat is defined in section 3 of the Act as:
    (1) The specific areas within the geographical area occupied by the 
species, at the time it is listed in accordance with the Act, on which 
are found those physical or biological features
    (a) Essential to the conservation of the species, and
    (b) Which may require special management considerations or 
protection; and
    (2) Specific areas outside the geographical area occupied by the 
species at the time it is listed, upon a determination that such areas 
are essential for the conservation of the species.
    Our regulations at 50 CFR 424.02 define the geographical area 
occupied by the species as an area that may generally be delineated 
around species' occurrences, as determined by the Secretary (i.e., 
range). Such areas may include those areas used throughout all or part 
of the species' life cycle, even if not used on a regular basis (e.g., 
migratory corridors, seasonal habitats, and habitats used periodically, 
but not solely by vagrant individuals). Additionally, our regulations 
at 50 CFR 424.02 define the word ``habitat'' as follows: ``For the 
purposes of designating critical habitat only, habitat is the abiotic 
and biotic setting that currently or periodically contains the 
resources and conditions necessary to support one or more life 
processes of a species.''
    Conservation, as defined under section 3 of the Act, means to use 
and the use of all methods and procedures that are necessary to bring 
an endangered or threatened species to the point at which the measures 
provided pursuant to the Act are no longer necessary. Such methods and 
procedures include, but are not limited to, all activities associated 
with scientific resources management such as research, census, law 
enforcement, habitat acquisition and maintenance, propagation, live 
trapping, and transplantation, and, in the extraordinary case where 
population pressures within a given ecosystem cannot be otherwise 
relieved, may include regulated taking.
    Critical habitat receives protection under section 7 of the Act 
through the requirement that Federal agencies ensure, in consultation 
with the Service, that any action they authorize, fund, or carry out is 
not likely to result in the destruction or adverse modification of 
critical habitat. The designation of critical habitat does not affect 
land ownership or establish a refuge, wilderness, reserve, preserve, or 
other conservation area. Such designation also does not allow the 
government or public to access private lands. Such designation does not 
require implementation of restoration, recovery, or enhancement 
measures by non-Federal landowners. Where a landowner requests Federal 
agency funding or authorization for an action that may affect a listed 
species or critical habitat, the Federal agency would be required to 
consult with the Service under section 7(a)(2) of the Act. However, 
even if the Service were to conclude that the proposed activity would 
result in destruction or adverse modification of the critical habitat, 
the Federal action agency and the landowner are not required to abandon 
the proposed activity, or to restore or recover the species; instead, 
they must implement ``reasonable and prudent alternatives'' to avoid 
destruction or adverse modification of critical habitat.
    Under the first prong of the Act's definition of critical habitat, 
areas within the geographical area occupied by the species at the time 
it was listed are included in a critical habitat designation if they 
contain physical or biological features (1) which are essential to the 
conservation of the species and (2) which may require special 
management considerations or protection. For these areas, critical 
habitat designations identify, to the extent known using the best 
scientific and commercial data available, those physical or biological 
features that are essential to the conservation of the species (such as 
space, food, cover, and protected habitat). In identifying those 
physical or biological features that occur in specific occupied areas, 
we focus on the specific features that are essential to support the 
life-history needs of the species, including, but not limited to, water 
characteristics, soil type, geological features, prey, vegetation, 
symbiotic species, or other features. A feature may be a single habitat 
characteristic, or a more complex combination of habitat 
characteristics. Features may include habitat characteristics that 
support ephemeral or dynamic habitat conditions. Features may also be 
expressed in terms relating to principles of conservation biology, such 
as patch size, distribution distances, and connectivity.
    Under the second prong of the Act's definition of critical habitat, 
we can designate critical habitat in areas outside the geographical 
area occupied by the species at the time it is listed, upon a 
determination that such areas are essential for the conservation of the 
species. The implementing regulations at 50 CFR 424.12(b)(2) further 
delineate unoccupied critical habitat by setting out three specific 
parameters: (1) When designating critical habitat, the Secretary will 
first evaluate areas occupied by the species; (2) the Secretary will 
only consider unoccupied areas to be essential where a critical

[[Page 62681]]

habitat designation limited to geographical areas occupied by the 
species would be inadequate to ensure the conservation of the species; 
and (3) for an unoccupied area to be considered essential, the 
Secretary must determine that there is a reasonable certainty both that 
the area will contribute to the conservation of the species and that 
the area contains one or more of those physical or biological features 
essential to the conservation of the species.
    Section 4 of the Act requires that we designate critical habitat on 
the basis of the best scientific data available. Further, our Policy on 
Information Standards Under the Endangered Species Act (published in 
the Federal Register on July 1, 1994 (59 FR 34271)), the Information 
Quality Act (section 515 of the Treasury and General Government 
Appropriations Act for Fiscal Year 2001 (Pub. L. 106-554; H.R. 5658)), 
and our associated Information Quality Guidelines provide criteria, 
establish procedures, and provide guidance to ensure that our decisions 
are based on the best scientific data available. They require our 
biologists, to the extent consistent with the Act and with the use of 
the best scientific data available, to use primary and original sources 
of information as the basis for recommendations to designate critical 
habitat.
    When we are determining which areas should be designated as 
critical habitat, our primary source of information is generally the 
information from the SSA report and information developed during the 
listing process for the species. Additional information sources may 
include any generalized conservation strategy, criteria, or outline 
that may have been developed for the species; the recovery plan for the 
species; articles in peer-reviewed journals; conservation plans 
developed by States and counties; scientific status surveys and 
studies; biological assessments; other unpublished materials; or 
experts' opinions or personal knowledge.
    As the regulatory definition of ``habitat'' reflects (50 CFR 
424.02), habitat is dynamic, and species may move from one area to 
another over time. We recognize that critical habitat designated at a 
particular point in time may not include all of the habitat areas that 
we may later determine are necessary for the recovery of the species. 
For these reasons, a critical habitat designation does not signal that 
habitat outside the designated area is unimportant or may not be needed 
for recovery of the species. Areas that are important to the 
conservation of the species, both inside and outside the critical 
habitat designation, will continue to be subject to: (1) Conservation 
actions implemented under section 7(a)(1) of the Act, (2) regulatory 
protections afforded by the requirement in section 7(a)(2) of the Act 
for Federal agencies to ensure their actions are not likely to 
jeopardize the continued existence of any endangered or threatened 
species, and (3) the prohibitions found in section 9 of the Act. 
Federally funded or permitted projects affecting listed species outside 
their designated critical habitat areas may still result in jeopardy 
findings in some cases. These protections and conservation tools will 
continue to contribute to recovery of the species. Similarly, critical 
habitat designations made on the basis of the best available 
information at the time of designation will not control the direction 
and substance of future recovery plans, habitat conservation plans 
(HCPs), or other species conservation planning efforts if new 
information available at the time of those planning efforts calls for a 
different outcome.

Prudency Determination

    Section 4(a)(3) of the Act, as amended, and implementing 
regulations (50 CFR 424.12) require that, to the maximum extent prudent 
and determinable, the Secretary shall designate critical habitat at the 
time the species is determined to be an endangered or threatened 
species. Our regulations (50 CFR 424.12(a)(1)) state that the Secretary 
may, but is not required to, determine that a designation would not be 
prudent in the following circumstances:
    (i) The species is threatened by taking or other human activity and 
identification of critical habitat can be expected to increase the 
degree of such threat to the species;
    (ii) The present or threatened destruction, modification, or 
curtailment of a species' habitat or range is not a threat to the 
species, or threats to the species' habitat stem solely from causes 
that cannot be addressed through management actions resulting from 
consultations under section 7(a)(2) of the Act;
    (iii) Areas within the jurisdiction of the United States provide no 
more than negligible conservation value, if any, for a species 
occurring primarily outside the jurisdiction of the United States;
    (iv) No areas meet the definition of critical habitat; or
    (v) The Secretary otherwise determines that designation of critical 
habitat would not be prudent based on the best scientific data 
available.
    As discussed earlier in this document, there is currently no 
imminent threat of collection or vandalism identified under Factor B 
for this species, and identification and mapping of critical habitat is 
not expected to initiate any such threat. In our SSA report (Service 
2021, entire) and proposed listing determination for the bracted 
twistflower, we determined that the present or threatened destruction, 
modification, or curtailment of habitat or range is a threat to the 
bracted twistflower and that those threats in some way can be addressed 
by section 7(a)(2) consultation measures. The species occurs wholly in 
the jurisdiction of the United States, and we are able to identify 
areas that meet the definition of critical habitat. Therefore, because 
none of the circumstances enumerated in our regulations at 50 CFR 
424.12(a)(1) have been met and because the Secretary has not identified 
other circumstances for which this designation of critical habitat 
would be not prudent, we have determined that the designation of 
critical habitat is prudent for the bracted twistflower.

Critical Habitat Determinability

    Having determined that designation is prudent, under section 
4(a)(3) of the Act we must find whether critical habitat for the 
bracted twistflower is determinable. Our regulations at 50 CFR 
424.12(a)(2) state that critical habitat is not determinable when one 
or both of the following situations exist:
    (i) Data sufficient to perform required analyses are lacking, or
    (ii) The biological needs of the species are not sufficiently well 
known to identify any area that meets the definition of ``critical 
habitat.''
    When critical habitat is not determinable, the Act allows the 
Service an additional year to publish a critical habitat designation 
(16 U.S.C. 1533(b)(6)(C)(ii)).
    We reviewed the available information pertaining to the biological 
needs of the species and habitat characteristics where this species is 
located. This and other information represent the best scientific data 
available and led us to conclude that the designation of critical 
habitat is determinable for the bracted twistflower.

Physical or Biological Features Essential to the Conservation of the 
Species

    In accordance with section 3(5)(A)(i) of the Act and regulations at 
50 CFR 424.12(b), in determining which areas we will designate as 
critical habitat from within the geographical area occupied

[[Page 62682]]

by the species at the time of listing, we consider the physical or 
biological features that are essential to the conservation of the 
species and that may require special management considerations or 
protection. The regulations at 50 CFR 424.02 define ``physical or 
biological features essential to the conservation of the species'' as 
the features that occur in specific areas and that are essential to 
support the life-history needs of the species, including, but not 
limited to, water characteristics, soil type, geological features, 
sites, prey, vegetation, symbiotic species, or other features. A 
feature may be a single habitat characteristic or a more complex 
combination of habitat characteristics. Features may include habitat 
characteristics that support ephemeral or dynamic habitat conditions. 
Features may also be expressed in terms relating to principles of 
conservation biology, such as patch size, distribution distances, and 
connectivity. For example, physical features essential to the 
conservation of the species might include gravel of a particular size 
required for spawning, alkaline soil for seed germination, protective 
cover for migration, or susceptibility to flooding or fire that 
maintains necessary early-successional habitat characteristics. 
Biological features might include prey species, forage grasses, 
specific kinds or ages of trees for roosting or nesting, symbiotic 
fungi, or a particular level of nonnative species consistent with 
conservation needs of the listed species. The features may also be 
combinations of habitat characteristics and may encompass the 
relationship between characteristics or the necessary amount of a 
characteristic essential to support the life history of the species.
    In considering whether features are essential to the conservation 
of the species, we may consider an appropriate quality, quantity, and 
spatial and temporal arrangement of habitat characteristics in the 
context of the life-history needs, condition, and status of the 
species. These characteristics include, but are not limited to, space 
for individual and population growth and for normal behavior; food, 
water, air, light, minerals, or other nutritional or physiological 
requirements; cover or shelter; sites for breeding, reproduction, or 
rearing (or development) of offspring; and habitats that are protected 
from disturbance.

Summary of Essential Physical or Biological Features

    We derive the specific physical or biological features essential to 
the conservation of the bracted twistflower from studies of the 
species' habitat, ecology, and life history as described below. 
Additional information can be found in the SSA report available on 
http://www.regulations.gov and https://ecos.fws.gov/ecp/species/2856. 
We have determined that the following physical or biological features 
are essential to the conservation of the bracted twistflower:
Geological Substrate and Soils.
    The prevalent Cretaceous geological formations in the Edwards 
Plateau of central Texas include the Edwards group of formations and 
its equivalent, the Devils River formation, which replaces the Edwards 
to the west and south; both of these formations overlie the Glen Rose 
formation (Maclay and Small 1986, pp. 17-24). Karstic, porous 
limestones are abundant in the Edwards and Devils River formations, and 
conversely, the Glen Rose limestones have relatively little porosity. 
The Edwards Aquifer occupies the porous upper strata, and many seeps 
and springs occur along the Balcones Escarpment, where the boundary of 
these upper formations with the Glen Rose is exposed at the surface. 
Some units of the Edwards, Devils River, and Glen Rose formations are 
dolomitic, meaning that, in addition to calcium, they also contain 
significant amounts of magnesium. Bracted twistflower populations occur 
in close proximity to the exposed boundary of the Edwards or Devils 
River and Glen Rose formations (McNeal 1989, p. 15; Zippin 1997, p. 
223; Carr 2001, p. 1; Pepper 2010, p. 5). Most populations are less 
than 2 kilometers (km) (1.2 miles (mi)) from this boundary, as seen in 
less detailed, small-scale geological maps (Fowler 2014, pp. 11-12). A 
detailed, large-scale geological map of northern Bexar County (Clark et 
al. 2009) reveals that two bracted twistflower populations (Eisenhower 
City Park and Rancho Diana) occur in a narrow stratum identified as a 
basal nodular hydrostratigraphic member of the Kainer Formation, 
Edwards Group. This stratum is immediately below a dolomitic 
hydrostratigraphic member of the Kainer Formation, and immediately 
above a cavernous hydrostratigraphic member of the Glen Rose limestone 
(Service 2021, pp. 8-9, figures 6-8). Populations often occur in 
horizontal bands where these strata are exposed along slopes. Soils in 
the immediate vicinity of individual plants are very shallow clays with 
abundant rock fragments.
    Although we do not know why the species is associated with the 
Edwards-Glen Rose boundary, Fowler (2014, p. 12) proposed two 
hypotheses: (1) The species depends on increased seepage between these 
formations; and (2) the species requires higher levels of magnesium 
ions that leach from dolomitic limestone in the lower strata of the 
Edwards formation. These hypotheses are not mutually exclusive.
Ecological Community.
    Bracted twistflower occurs in native, old-growth juniper-oak 
woodlands and shrublands along the Balcones Escarpment. Individual 
plants frequently occur near or under a canopy of Ashe juniper, Texas 
live oak, Texas persimmon (Diospyros texana), Texas mountain laurel, 
Texas red oak or other trees. In many sites bracted twistflower 
inhabits dense thickets of evergreen sumac (Rhus virens), agarita 
(Mahonia trifoliolata), Roemer acacia (Acacia roemeriana), Lindheimer 
silk-tassel (Garrya ovata ssp. lindheimeri), thoroughwort (Ageratina 
havanensis), oreja de rat[oacute]n (Bernardia myricifolia), or other 
shrubs.
    Bracted twistflower is a winter annual plant that persists only 
where individuals produce enough seeds to sustain a reserve of viable 
seeds in the soil. White-tailed deer and introduced ungulates heavily 
browse the flower stalks of individual plants before they can set seed, 
thus contributing to the decline of populations. Herbivory threatens 
the species throughout its range, except where it is protected from 
deer by fencing or intensive herd management (hunting) (McNeal 1989, p. 
17; Damude and Poole 1990, pp. 52-53; Dieringer 1991, p. 341; Zippin 
1997, pp. 39-197, 227; Leonard 2010, pp. 36-43; Fowler 2014, pp. 17, 
19). The extremely high deer densities in the Edwards Plateau of Texas 
exacerbate the species' vulnerability to herbivory (Zippin 1997, p. 
227).
    In sites that are protected from white-tailed deer, the most robust 
bracted twistflower plants occur where woody plant cover is less dense 
(Damude and Poole 1990, pp. 29-30; Poole et al. 2007, p. 470). The two 
largest populations, Laurel Canyon and Rancho Diana, occur in 
relatively open vegetation of low shrubs and sotol (Dasylirion 
texanum), where there is little or no juniper cover. Laboratory and 
field experiments demonstrated that growth and reproduction of bracted 
twistflower benefits from higher light intensity and duration than it 
receives in many of the extant populations (Fowler 2010, pp. 10-11; 
Leonard 2010, p. 63; Ramsey 2010, p. 20); its persistence in dense 
thickets may be due to increased herbivory of the plants growing in 
more open vegetation (Leonard 2010, p. 63; Ramsey 2010, p. 22). Deer-
exclusion cages significantly increased the

[[Page 62683]]

probability of survival, reproduction, above-ground biomass, and seed 
set, compared to un-caged plants, at a bracted twistflower population 
near Mesa Drive in Austin where the deer population was very high 
(Zippin 1997, p. 60). In 2012, the City of San Antonio Parks and 
Recreation Department (SAPRD) protected the Rancho Diana population 
with a deer-fenced exclosure. In August and September 2017, SAPRD 
personnel cut to ground level all woody vegetation in a 760-m2 (8,180-
ft2) plot within the exclosure. In May 2018, the number of bracted 
twistflower plants within the cleared plot was 16 times greater, and 
seed production within the plot was 15 times greater, than in any of 4 
previous years (Cozort 2019). In synthesis, shaded juniper thickets may 
serve as refugia from herbivory, but are not the species' optimal 
habitat. Bracted twistflower is best adapted to microsites at canopy 
gaps and edges within the juniper-oak woodland where it receives direct 
sunlight at least part of the day. It is likely that wildfires occurred 
more frequently in bracted twistflower habitats prior to European 
settlement, and that the more recent reduction in fire frequency has 
allowed Ashe juniper to increase in cover and density (Bray 1904, pp. 
14-15, 23-24; Fonteyn et al. 1988, p. 79; Service 2021, pp. 12, 29-30).
    Bracted twistflower produces seeds primarily through outcrossing 
(fertilization between different individuals), and therefore depends 
heavily on pollinators, including a native leafcutter bee, Megachile 
comata, for reproduction (Dieringer 1991, pp. 341-343). Halictid bees 
(sweat bees) and other native bee species may also be effective 
pollinators (Service 2021, p. 5). Therefore, bracted twistflower 
habitats must also support populations of leafcutter bees and other 
native bee species that effectively pollinate the species. Native bees 
in turn require, as sources of pollen and nectar, a diverse, abundant 
understory of native forb and shrub species that in the past was 
periodically renewed by wildfires.
    In summary, the essential physical and biological features of 
bracted twistflower are:
    (1) Karstic, dolomitic limestones underlain by less permeable 
limestone strata, where perched aquifers seep to the surface along 
slopes. These are often found within 2 kilometers of the exposed 
boundary of the Edwards or Devils River and Glen Rose geological 
formations;
    (2) Native, old-growth juniper-oak woodlands and shrublands along 
the Balcones Escarpment;
    (3) Herbivory from white-tailed deer and introduced ungulates of 
such low intensity that it does not severely deplete populations prior 
to seed dispersal;
    (4) Tree and shrub canopy gaps that allow direct sunlight to reach 
the herbaceous plant layer at least 6 hours per day; and
    (5) Viable populations of native bee species and the abundant, 
diverse forb and shrub understory that support them.

Special Management Considerations or Protection

    When designating critical habitat, we assess whether the specific 
areas within the geographical area occupied by the species at the time 
of listing contain features which are essential to the conservation of 
the species and which may require special management considerations or 
protection. The features essential to the conservation of this species 
may require special management considerations or protections to reduce 
the following threats: Habitat loss due to urban and residential 
development, increased woody plant cover, severe herbivory by native 
and introduced ungulates, and trampling and erosion from recreational 
use. Management activities that could ameliorate these threats include 
(but are not limited to) juniper thinning, prescribed fire, fencing to 
exclude deer and other herbivores, herd management of local ungulate 
populations, and protection from foot and bicycle traffic. These 
management activities will protect the physical and biological features 
essential for the conservation of the species by reducing herbivory, 
maintaining open canopies, protecting the habitat from trampling and 
erosion, and conserving diverse shrub and forb understory vegetation 
that supports the species' native bee pollinators.

Criteria Used To Identify Critical Habitat

    As required by section 4(b)(2) of the Act, we use the best 
scientific data available to designate critical habitat. In accordance 
with the Act and our implementing regulations at 50 CFR 424.12(b), we 
review available information pertaining to the habitat requirements of 
the species and identify specific areas within the geographical area 
occupied by the species at the time of listing and any specific areas 
outside the geographical area occupied by the species to be considered 
for designation as critical habitat.

Areas Occupied at the Time of Listing

    We considered the geographic areas occupied by the species at the 
time of listing to consist of EOs with survey data within the past 7 
years or areas in which we confirmed that habitat remained intact using 
aerial imagery. We know that seeds can remain dormant and viable in the 
soil of intact sites for at least 7 years. Due to the large proportion 
of private lands within the range of the species, the majority of known 
locations occur on publicly-owned conservation lands that can be 
accessed for surveys. Most of the critical habitat units have been 
surveyed annually, and the habitats are protected by the cities of 
Austin and San Antonio. We do not have recent surveys for two sites, 
EOs 10 and 18 (Garner State Park and Medina Lake). However, we have 
precise geographic coordinates for these populations collected with 
Global Positioning System (GPS) instruments. In a Geographic 
Information System (GIS), we have overlaid the geographic coordinates 
of these sites on recent orthographically corrected aerial photographs 
and have determined that the habitats remain intact.
    We designated critical habitat units only at extant EOs that still 
possess one or more of the physical and biological features that are 
essential to its conservation. We delineated each critical habitat unit 
around areas where karstic, dolomitic limestones of the Edwards or 
Devils River formations overlay the less permeable Glen Rose formation. 
The elevation ranges and degree of slope of these geological strata 
vary among EOs. However, because the exposed strata that support 
bracted twistflower populations are nearly horizontal, we used the 
elevation range where individuals have been observed at each EO to 
delineate this essential geological feature over the short distances 
spanned by that EO Similarly, since seepage from overlying karst 
aquifers occurs on slopes, we also used the range of slopes where 
individuals have been observed at each EO to delineate this essential 
feature at that EO. Thus, we combined the parameters of the observed 
elevation range and slope range of the species at each EO to delimit 
each critical habitat unit. However, we excluded any areas that lack 
natural vegetation, such as roads and buildings, as determined through 
examination of recent aerial photographs. We also did not designate 
critical habitat units at EOs that are no longer occupied, or that no 
longer possess the essential physical and biological features due to 
development or significant disturbance. Finally, we did not extend 
critical habitat units beyond areas that have been surveyed, because we 
cannot determine if they

[[Page 62684]]

contain the essential physical or biological features.

Areas Outside the Geographic Area Occupied at the Time of Listing

    We are not proposing to designate any areas outside the geographic 
area currently occupied by bracted twistflower because we did not find 
any unoccupied areas that contained the necessary PBFs and were 
essential for the conservation of the species. We are designating 
critical habitat within occupied habitat in all three representation 
areas, including areas that preserve the populations with the highest 
resiliency. Therefore, unoccupied areas are not necessary for the 
recovery of the species.

General Information on the Maps of the Proposed Critical Habitat 
Designation

    When determining proposed critical habitat boundaries, we made 
every effort to avoid including developed areas such as lands covered 
by buildings, pavement, and other structures because such lands lack 
physical or biological features necessary for bracted twistflower. The 
scale of the maps we prepared under the parameters for publication 
within the Code of Federal Regulations may not reflect the exclusion of 
such developed lands. Any such lands inadvertently left inside critical 
habitat boundaries shown on the maps of this proposed rule have been 
excluded by text in the proposed rule and are not proposed for 
designation as critical habitat. Therefore, if the critical habitat is 
finalized as proposed, a Federal action involving these lands would not 
trigger section 7 consultation with respect to critical habitat and the 
requirement of no adverse modification unless the specific action would 
affect the physical or biological features in the adjacent critical 
habitat.
    We propose to designate as critical habitat lands that we have 
determined are occupied at the time of listing (i.e., currently 
occupied) and that contain one or more of the physical or biological 
features that are essential to support life-history processes of the 
species.
    Some units contain all of the identified physical or biological 
features and support multiple life-history processes. Some units 
contain only some of the physical or biological features necessary to 
support the bracted twistflower's particular use of that habitat.
    The proposed critical habitat designation is defined by the maps, 
as modified by any accompanying regulatory text, presented at the end 
of this document under Proposed Regulation Promulgation. We include 
more detailed information on the boundaries of the critical habitat 
designation in the preamble of this document. We will make the 
coordinates or plot points or both on which each map is based available 
to the public on http://www.regulations.gov at Docket No. FWS-R2-ES-
2021-0013 and at the field office responsible for the designation (see 
FOR FURTHER INFORMATION CONTACT).

Proposed Critical Habitat Designation

    We are proposing approximately 1,607 acres (ac) (650 hectares (ha)) 
in three units as critical habitat for the bracted twistflower. The 
critical habitat areas we describe below constitute our current best 
assessment of areas that meet the definition of critical habitat for 
the bracted twistflower. The three areas we propose as critical habitat 
are: (1) Northeast Unit; (2) Central Unit; and (3) Southwest Unit. 
Table 2 shows the proposed critical habitat units, the land ownership, 
and the approximate area of each unit. All units proposed for 
designation are occupied.

                      Table 2--Proposed Critical Habitat Units for the Bracted Twistflower
                   [Area estimates reflect all land within critical habitat unit boundaries.]
----------------------------------------------------------------------------------------------------------------
                                     Subunit                                              Critical habitat size
                                  (conservation                                        -------------------------
             Unit                area or property    Property owner       Occupied?
                                      name)                                                  Ac           Ha
----------------------------------------------------------------------------------------------------------------
1. Northeast..................  1a. Barton Creek   City of Austin...  Yes.............       690.50       279.44
                                 Park/Wilderness
                                 Area (EOs 17,
                                 36).
                                1b. Bull Creek     City of Austin...  Yes.............         2.32         0.94
                                 Park (EO 35).
                                1c. Mount Bonnell  City of Austin...  Yes.............         2.00         0.81
                                 Park (EO 9).
                                1d. Ullrich Water  City of Austin...  Yes.............        29.92        12.11
                                 Treatment Plant
                                 (Bee Creek Park)
                                 (EO 7).
2. Central....................  2a. Eisenhower     City of San        Yes.............        78.16        31.63
                                 Park (EO 23).      Antonio.
                                2b. Rancho Diana   City of San        Yes.............       395.73       160.15
                                 (EO 31).           Antonio.
                                2c. Laurel Canyon  Laurel C. Canyon   Yes.............        39.59        16.02
                                 Ranch              Ranch LP; City
                                 Conservation       of San Antonio
                                 Easement (EO 25).  holds
                                                    conservation
                                                    easement.
                                2d. Medina River   Private..........  Yes.............        23.28         9.42
                                 (EO 18).
3. Southwest..................  Garner State Park  Texas Parks and    Yes.............       345.22       139.71
                                 (EO 10).           Wildlife
                                                    Department.
                                                                                       -------------------------
    Totals....................  .................  .................  ................     1,606.72       650.23
----------------------------------------------------------------------------------------------------------------
Note: Area sizes may not sum exactly due to rounding.

    We present brief descriptions of all units, and reasons why they 
meet the definition of critical habitat for the bracted twistflower, 
below.

Unit 1: Northeast

    Unit 1 consists of 725 ac (293 ha) of occupied habitat within 
Travis County, Texas, and is composed of four subunits, which are 
described below.
Subunit 1a
    Barton Creek Greenbelt and Barton Creek Wilderness Park consist of 
838.76 ac (339.44 ha) and 1,120.26 ac (453.36 ha) of protected areas, 
respectively, along Barton Creek within the City of

[[Page 62685]]

Austin. These contiguous conservation areas are owned and managed by 
the City of Austin Parks and Recreation Department as units of the BCP 
system. We are proposing to designate 690.50 ac (279.44 ha) of the 
Barton Creek BCP units as occupied critical habitat for the bracted 
twistflower (EOs 17 and 36). This subunit contains the essential 
physical and biological features of proximity to the geological 
boundary, old-growth juniper-oak woodlands, and viable native bee 
populations; the subunit has small canopy gaps, and small areas are 
protected from deer. Specific threats include juniper encroachment into 
canopy gaps, white-tailed deer herbivory, infrequent wildfire, and off-
trail recreational uses. Special management needed for bracted 
twistflower within this subunit includes white-tailed deer herd 
management and thinning of juniper trees; if it can be conducted 
safely, management could include prescribed burning. The primary 
management goal of these BCP units is to conserve the golden-cheeked 
warbler (Dendroica chrysoparia), bracted twistflower, and protected 
cave invertebrates, while providing appropriate, safe, public 
recreational access; over 100,000 people visit the Barton Creek units 
annually for outdoor recreational uses (City of Austin 2007a, pp. 1-
11). The specific management objectives relevant to the bracted 
twistflower include posting educational signs, developing memoranda of 
cooperation with user groups, conducting outreach to user groups, 
blocking unauthorized trails, enforcing trail closures, thinning 
junipers, and controlling exotic species. The City of Austin Wildland 
Conservation Division monitors the Barton Creek bracted twistflower 
populations annually (City of Austin 2018); we estimate that this is 
the second largest known population of this species.
Subunit 1b
    Bull Creek District Park, acquired in 1971, is a 47.30-ac (19.14-
ha) conservation area owned and managed by the City of Austin Parks and 
Recreation Department as a unit of the BCP system. We are proposing to 
designate 2.32 ac (0.94 ha) of this BCP unit as occupied critical 
habitat for the bracted twistflower (EO 35). This subunit contains the 
essential physical and biological features of proximity to the 
geological boundary, old-growth juniper-oak woodlands, and viable 
native bee populations. Specific threats include juniper encroachment 
into canopy gaps, white-tailed deer herbivory, infrequent wildfire, 
off-trail recreational uses, and small population size. Special 
management needed for the bracted twistflower within this subunit 
includes white-tailed deer herd management and thinning of juniper 
trees; if it can be conducted safely, management could include 
prescribed burning. The primary management goals of this BCP unit are 
to maintain and improve habitat for golden-cheeked warblers; to protect 
karst species and other species of concern, including canyon mock-
orange (Philadelphus ernestii), a rare endemic shrub; and to protect 
the watershed, water quantity, and water quality (City of Austin 2007b, 
pp. 1-5). A secondary management goal is to provide safe public access 
for outdoor recreation. Although the bracted twistflower is not 
specifically included in the BCP management plan for Bull Creek 
District Park, a small population was discovered there after the plan 
was developed and is now monitored annually by the City of Austin 
Wildland Conservation Division (City of Austin 2018).
Subunit 1c
    Mount Bonnell Park (Covert Park at Mount Bonnell) is a 6.07-ac 
(2.45-ha) conservation area owned and managed by the City of Austin 
Parks and Recreation Department as a unit of the BCP system. We are 
proposing to designate 2.00 ac (0.81 ha) of this BCP unit as occupied 
critical habitat for the bracted twistflower (EO 9). This subunit 
contains the essential physical and biological features of proximity to 
the geological boundary, old-growth juniper-oak woodlands, and viable 
native bee populations. Specific threats include juniper encroachment 
into canopy gaps, white-tailed deer herbivory, infrequent wildfire, 
off-trail recreational uses, and small population size. Special 
management needed for the bracted twistflower within this subunit 
includes white-tailed deer herd management and thinning of juniper 
trees; if it can be conducted safely, management could include 
prescribed burning. The primary management goal for the BCP acreage of 
Mt. Bonnell is to protect and manage habitat for the bracted 
twistflower (City of Austin 2007c, pp. 1-4). Management objectives 
include stopping unauthorized foot traffic into the species' habitat; 
conducting annual monitoring of the population; increasing the 
population size; working with adjacent private landowners to protect 
and manage the species; and removing nonnative, invasive vegetation. 
The City of Austin Wildland Conservation Division monitors the Mount 
Bonnell bracted twistflower population annually (City of Austin 2018). 
This small population is a remnant of a much larger population that 
extended onto adjacent private land and was subsequently lost to 
residential development.
Subunit 1d
    Ullrich Water Treatment Plant (Bee Creek Park) is a 95.42-ac 
(38.61-ha) property owned and managed by the City of Austin Water 
Utility. The Balcones Canyonlands Conservation Plan designated 17.7 ac 
(7.16 ha) of this property as BCP Habitat Management Areas. We are 
proposing to designate 29.92 ac (12.11 ha) of this BCP unit as occupied 
critical habitat for the bracted twistflower (EO 7); the proposed 
critical habitat area includes some undeveloped portions of the 
property that were not included in the BCP Habitat Management Area 
designation. This subunit contains the essential physical and 
biological features of proximity to the geological boundary, old-growth 
juniper-oak woodlands, protection from deer herbivory, and viable 
native bee populations. Specific threats include juniper encroachment 
into canopy gaps, infrequent wildfire, and small population size. 
Special management needed for the bracted twistflower within this 
subunit includes white-tailed deer herd management and thinning of 
juniper trees; if it can be conducted safely, management could include 
prescribed burning. The primary management goals are to protect and 
maintain habitat for the golden-cheeked warbler, protect karst features 
and monitor the Bee Creek Cave harvestman (Texella reddelli) and other 
karst invertebrates, protect the population of bracted twistflower at 
this site, and protect the Little Bee Creek watershed quality (City of 
Austin 2007d, pp. 1-4). Austin Water Utility constructed a game fence 
to protect the bracted twistflower population from deer browsing and 
unauthorized public access. The City of Austin Wildland Conservation 
Division monitors the Ullrich bracted twistflower population annually 
(City of Austin 2018).

Unit 2: Central

    Unit 2 consists of 537 ac (217 ha) of occupied habitat within Bexar 
and Medina Counties in Texas. This unit is composed of four subunits, 
which are described below.
Subunit 2a
    Eisenhower Park is a 324-ac (131-ha) designated natural area in 
Bexar County owned by the City of San Antonio and managed by San 
Antonio Parks and Recreation Department (SAPRD). It is bounded on the 
north by Camp Bullis Military Reservation. We are proposing

[[Page 62686]]

to designate 78.16 ac (31.63 ha) as occupied critical habitat for the 
bracted twistflower at Eisenhower Park (EO 23). This subunit contains 
the essential physical and biological features of proximity to the 
geological boundary, old-growth juniper-oak woodlands, protection from 
deer herbivory, tree and shrub canopy gaps, and viable native bee 
populations. Specific threats include herbivory from white-tailed deer, 
juniper encroachment into canopy gaps, infrequent wildfire, off-trail 
recreational uses, and small population size. Special management needed 
for the bracted twistflower within this subunit includes white-tailed 
deer herd management and thinning of juniper trees; if it can be 
conducted safely, management could include prescribed burning. One 
population of bracted twistflower occurred on both sides of the 
Eisenhower Park-Camp Bullis boundary; however, no individuals have been 
observed on the Camp Bullis side for about 10 years. SAPRD monitors the 
population at Eisenhower Park annually; additionally, SAPRD has 
installed deer-fenced exclosures to prevent herbivory and has 
selectively thinned the woody overstory to increase sunlight exposure 
(Austin 2018, p. 10; Cozort 2019, p. 2). SAPRD currently proposes to 
augment the population size and genetic diversity through propagation 
and reintroduction (Cozort 2019).
Subunit 2b
    Rancho Diana is a 1,148-ac (465-ha) natural area in Bexar County 
acquired by the City of San Antonio through the City's 2005 Edwards 
Aquifer Protection program. We are proposing to designate 395.73 ac 
(160.15 ha) as occupied critical habitat for the bracted twistflower at 
Rancho Diana (EO 31). This subunit contains the essential physical and 
biological features of proximity to the geological boundary, old-growth 
juniper-oak woodlands, protection from deer herbivory, tree and shrub 
canopy gaps, and viable native bee populations. Specific threats 
include herbivory from white-tailed deer, juniper encroachment into 
canopy gaps, and infrequent wildfire. Special management needed for the 
bracted twistflower within this subunit includes white-tailed deer herd 
management and thinning of juniper trees; if it can be conducted 
safely, management could include prescribed burning. This property is 
managed by SAPRD, but currently is not open to the public. SAPRD 
discovered a large population of bracted twistflower at Rancho Diana in 
2010, and subsequently protected the population with a deer-fenced 
exclosure; however, portions of the population extend beyond this 
exclosure and are vulnerable to herbivory. SAPRD cleared the overstory 
brush from small portions of the enclosed population in 2017 and 2019, 
resulting in a large increase in the emergence and seed production of 
bracted twistflowers within the cleared areas.
Subunit 2c
    Laurel Canyon Ranch Conservation Easement is a private property in 
Medina County owned by Laurel C. Canyon Ranch Limited Partnership, of 
Houston, Texas. The City of San Antonio Edwards Aquifer Protection 
Program holds a conservation easement on 549 ac (222 ha) of Laurel 
Canyon Ranch (City of San Antonio and The Nature Conservancy 2016). 
About 87 percent of the easement is within the Edwards Aquifer Recharge 
Zone, and the conservation easement protects water quantity and quality 
for the City of San Antonio. This subunit is not open to the public. 
The largest known population of the bracted twistflower was documented 
at this site in 2001 (Carr 2001; TXNDD 2018), and has been monitored 
annually by SAPRD since 2018. We are proposing to designate 39.59 ac 
(16.02 ha) as occupied critical habitat for the bracted twistflower at 
the Laurel Canyon Ranch Conservation Easement (EO 25). This subunit 
contains the essential physical and biological features of proximity to 
the geological boundary, old-growth juniper-oak woodlands, tree and 
shrub canopy gaps, and viable native bee populations. Specific threats 
include herbivory from white-tailed deer, juniper encroachment into 
canopy gaps, and infrequent wildfire. Special management needed for the 
bracted twistflower within this subunit includes white-tailed deer herd 
management and thinning of juniper trees; if it can be conducted 
safely, management could include prescribed burning.
Subunit 2d
    Medina River is a 722.81-ac (292.52-ha) tract of private property 
in Medina County owned by Medina Ranch Inc. of San Antonio, Texas. A 
population of about 1,000 bracted twistflowers was documented there in 
April 2007 (TXNDD 2018). We are proposing to designate 23.28 ac (9.42 
ha), located along bluffs overlooking the Medina River Diversion Lake, 
as occupied critical habitat for the bracted twistflower (EO 18). This 
subunit contains the essential physical and biological features of 
proximity to the geological boundary, old-growth juniper-oak woodlands, 
tree and shrub canopy gaps, and viable native bee populations. Specific 
threats include herbivory from white-tailed deer, juniper encroachment 
into canopy gaps, and infrequent wildfire. Special management needed 
for the bracted twistflower within this subunit includes white-tailed 
deer herd management and thinning of juniper trees; if it can be 
conducted safely, management could include prescribed burning. This 
subunit is not open to the public.

Unit 3: Southwest

    Unit 3 consists of occupied habitat within Uvalde County, Texas. 
Garner State Park was donated by local landowners to the State of Texas 
in 1941, and is managed by TPWD. One population of bracted twistflower 
persists at this very heavily visited, 1,786-ac (723-ha) State park. We 
are proposing to designate 345.23 ac (139.71 ha) as occupied critical 
habitat for the bracted twistflower at Garner State Park (EO 10). This 
subunit contains the essential physical and biological features of 
proximity to the geological boundary, old-growth juniper-oak woodlands, 
tree and shrub canopy gaps, and viable native bee populations. Specific 
threats include herbivory from white-tailed deer and introduced 
ungulates, juniper encroachment into canopy gaps, off-trail 
recreational uses of habitats, and infrequent wildfire. Special 
management needed for the bracted twistflower within this subunit 
includes white-tailed deer herd management and thinning of juniper 
trees; if it can be conducted safely, management could include 
prescribed burning.

Effects of Critical Habitat Designation

Section 7 Consultation

    Section 7(a)(2) of the Act requires Federal agencies, including the 
Service, to ensure that any action they fund, authorize, or carry out 
is not likely to jeopardize the continued existence of any endangered 
species or threatened species or result in the destruction or adverse 
modification of designated critical habitat of such species. In 
addition, section 7(a)(4) of the Act requires Federal agencies to 
confer with the Service on any agency action which is likely to 
jeopardize the continued existence of any species proposed to be listed 
under the Act or result in the destruction or adverse modification of 
proposed critical habitat.
    We published a final rule revising the definition of destruction or 
adverse modification on August 27, 2019 (84 FR 44976). Destruction or 
adverse

[[Page 62687]]

modification means a direct or indirect alteration that appreciably 
diminishes the value of critical habitat as a whole for the 
conservation of a listed species.
    If a Federal action may affect a listed species or its critical 
habitat, the responsible Federal agency (action agency) must enter into 
consultation with us. Examples of actions that are subject to the 
section 7 consultation process are actions on State, Tribal, local, or 
private lands that require a Federal permit (such as a permit from the 
U.S. Army Corps of Engineers under section 404 of the Clean Water Act 
(33 U.S.C. 1251 et seq.) or a permit from the Service under section 10 
of the Act) or that involve some other Federal action (such as funding 
from the Federal Highway Administration, Federal Aviation 
Administration, or the Federal Emergency Management Agency). Federal 
actions not affecting listed species or critical habitat--and actions 
on State, Tribal, local, or private lands that are not federally 
funded, authorized, or carried out by a Federal agency--do not require 
section 7 consultation.
    Compliance with the requirements of section 7(a)(2) is documented 
through our issuance of:
    (1) A concurrence letter for Federal actions that may affect, but 
are not likely to adversely affect, listed species or critical habitat; 
or
    (2) A biological opinion for Federal actions that may affect and 
are likely to adversely affect listed species or critical habitat.
    When we issue a biological opinion concluding that a project is 
likely to jeopardize the continued existence of a listed species and/or 
destroy or adversely modify critical habitat, we provide reasonable and 
prudent alternatives to the project, if any are identifiable, that 
would avoid the likelihood of jeopardy and/or destruction or adverse 
modification of critical habitat. We define ``reasonable and prudent 
alternatives'' (at 50 CFR 402.02) as alternative actions identified 
during consultation that:
    (1) Can be implemented in a manner consistent with the intended 
purpose of the action,
    (2) Can be implemented consistent with the scope of the Federal 
agency's legal authority and jurisdiction,
    (3) Are economically and technologically feasible, and
    (4) Would, in the Service Director's opinion, avoid the likelihood 
of jeopardizing the continued existence of the listed species and/or 
avoid the likelihood of destroying or adversely modifying critical 
habitat.
    Reasonable and prudent alternatives can vary from slight project 
modifications to extensive redesign or relocation of the project. Costs 
associated with implementing a reasonable and prudent alternative are 
similarly variable.
    Regulations at 50 CFR 402.16 set forth requirements for Federal 
agencies to reinitiate formal consultation on previously reviewed 
actions. These requirements apply when the Federal agency has retained 
discretionary involvement or control over the action (or the agency's 
discretionary involvement or control is authorized by law) and, if 
subsequent to the previous consultation: (1) If the amount or extent of 
taking specified in the incidental take statement is exceeded; (2) if 
new information reveals effects of the action that may affect listed 
species or critical habitat in a manner or to an extent not previously 
considered; (3) if the identified action is subsequently modified in a 
manner that causes an effect to the listed species or critical habitat 
that was not considered in the biological opinion; or (4) if a new 
species is listed or critical habitat designated that may be affected 
by the identified action.

Application of the ``Destruction or Adverse Modification'' Standard

    The key factor related to the destruction or adverse modification 
determination is whether implementation of the proposed Federal action 
directly or indirectly alters the designated critical habitat in a way 
that appreciably diminishes the value of the critical habitat as a 
whole for the conservation of the listed species. As discussed above, 
the role of critical habitat is to support physical or biological 
features essential to the conservation of a listed species and provide 
for the conservation of the species.
    Section 4(b)(8) of the Act requires us to briefly evaluate and 
describe, in any proposed or final regulation that designates critical 
habitat, activities involving a Federal action that may violate section 
7(a)(2) of the Act by destroying or adversely modifying such habitat, 
or that may be affected by such designation.
    Activities that the Service may, during a consultation under 
section 7(a)(2) of the Act, consider likely to destroy or adversely 
modify critical habitat include, but are not limited to, actions that 
would disturb the soil or underlying rock strata, reduce the diversity 
and abundance of native bees and bee-pollinated plant species, or 
diminish the perched aquifers that supply seep moisture to bracted 
twistflower habitats. Such activities could include, but are not 
limited to, excavation of soil or underlying rock strata with 
bulldozers, graders, back-hoes, or excavators within habitats; 
application of insecticides that kill or impair native bees; 
application of herbicides that kill or damage native bee-pollinated 
plants; and displacement of native juniper-oak woodlands with surface 
cover, such as pavement and buildings, that impede infiltration of 
rainwater into the soil. These activities could deplete or destroy the 
soil seed reserve of viable seeds of the bracted twistflower, diminish 
the abundance of the species' pollinators and thereby reduce seed 
production and gene flow, or alter the soil and hydrology so that it no 
longer supports the germination, establishment, and reproduction of the 
bracted twistflower.

Exemptions

Application of Section 4(a)(3) of the Act

    Section 4(a)(3)(B)(i) of the Act (16 U.S.C. 1533(a)(3)(B)(i)) 
provides that the Secretary shall not designate as critical habitat any 
lands or other geographical areas owned or controlled by the Department 
of Defense, or designated for its use, that are subject to an 
integrated natural resources management plan (INRMP) prepared under 
section 101 of the Sikes Act (16 U.S.C. 670a), if the Secretary 
determines in writing that such plan provides a benefit to the species 
for which critical habitat is proposed for designation. There are no 
Department of Defense lands with a completed INRMP within the proposed 
critical habitat designation.

Consideration of Impacts Under Section 4(b)(2) of the Act

    Section 4(b)(2) of the Act states that the Secretary shall 
designate and make revisions to critical habitat on the basis of the 
best available scientific data after taking into consideration the 
economic impact, national security impact, and any other relevant 
impact of specifying any particular area as critical habitat. The 
Secretary may exclude an area from critical habitat if we determine 
that the benefits of such exclusion outweigh the benefits of specifying 
such area as part of the critical habitat, unless we determine, based 
on the best scientific data available, that the failure to designate 
such area as critical habitat will result in the extinction of the 
species. In making the determination to exclude a particular area, the 
statute on its face, as well as the legislative history, are clear that 
the Secretary has broad

[[Page 62688]]

discretion regarding which factor(s) to use and how much weight to give 
to any factor.
    Under section 4(b)(2) of the Act, we may exclude an area from 
designated critical habitat based on economic impacts, impacts on 
national security, or any other relevant impacts. In considering 
whether to exclude a particular area from the designation, we identify 
the benefits of including the area in the designation, identify the 
benefits of excluding the area from the designation, and evaluate 
whether the benefits of exclusion outweigh the benefits of inclusion. 
If the analysis indicates that the benefits of exclusion outweigh the 
benefits of inclusion, the Secretary may exercise discretion to exclude 
the area only if such exclusion would not result in the extinction of 
the species. We describe below the process that we undertook for taking 
into consideration each category of impacts and our analyses of the 
relevant impacts.

Consideration of Economic Impacts

    Section 4(b)(2) of the Act and its implementing regulations require 
that we consider the economic impact that may result from a designation 
of critical habitat. To assess the probable economic impacts of a 
designation, we must first evaluate specific land uses or activities 
and projects that may occur in the area of the critical habitat. We 
then must evaluate the impacts that a specific critical habitat 
designation may have on restricting or modifying specific land uses or 
activities for the benefit of the species and its habitat within the 
areas proposed. We then identify which conservation efforts may be the 
result of the species being listed under the Act versus those 
attributed solely to the designation of critical habitat for this 
particular species. The probable economic impact of a proposed critical 
habitat designation is analyzed by comparing scenarios both ``with 
critical habitat'' and ``without critical habitat.''
    The ``without critical habitat'' scenario represents the baseline 
for the analysis, which includes the existing regulatory and socio-
economic burden imposed on landowners, managers, or other resource 
users potentially affected by the designation of critical habitat 
(e.g., under the Federal listing as well as other Federal, State, and 
local regulations). Therefore, the baseline represents the costs of all 
efforts attributable to the listing of the species under the Act (i.e., 
conservation of the species and its habitat incurred regardless of 
whether critical habitat is designated). The ``with critical habitat'' 
scenario describes the incremental impacts associated specifically with 
the designation of critical habitat for the species. The incremental 
conservation efforts and associated impacts would not be expected 
without the designation of critical habitat for the species. In other 
words, the incremental costs are those attributable solely to the 
designation of critical habitat, above and beyond the baseline costs. 
These are the costs we use when evaluating the benefits of inclusion 
and exclusion of particular areas from the final designation of 
critical habitat should we choose to conduct a discretionary 4(b)(2) 
exclusion analysis.
    For this particular designation, we developed an incremental 
effects memorandum (IEM) considering the probable incremental economic 
impacts that may result from this proposed designation of critical 
habitat. The information contained in our IEM was then used to develop 
a screening analysis of the probable effects of the designation of 
critical habitat for the bracted twistflower (IEc. 2020, entire). We 
began by conducting a screening analysis of the proposed designation of 
critical habitat in order to focus our analysis on the key factors that 
are likely to result in incremental economic impacts. The purpose of 
the screening analysis is to filter out particular geographic areas of 
critical habitat that are already subject to such protections and are, 
therefore, unlikely to incur incremental economic impacts. In 
particular, the screening analysis considers baseline costs (i.e., 
absent critical habitat designation) and includes any probable 
incremental economic impacts where land and water use may already be 
subject to conservation plans, land management plans, best management 
practices, or regulations that protect the habitat area as a result of 
the Federal listing status of the species. Ultimately, the screening 
analysis allows us to focus our analysis on evaluating the specific 
areas or sectors that may incur probable incremental economic impacts 
as a result of the designation. If the proposed critical habitat 
designation contains any unoccupied units, the screening analysis 
assesses whether those units are unoccupied because they require 
additional management or conservation efforts that may incur 
incremental economic impacts. This screening analysis combined with the 
information contained in our IEM constitute what we consider to be our 
draft economic analysis (DEA) of the proposed critical habitat 
designation for the bracted twistflower; our DEA is summarized in the 
narrative below.
    Executive Orders (EOs) 12866 and 13563 direct Federal agencies to 
assess the costs and benefits of available regulatory alternatives in 
quantitative (to the extent feasible) and qualitative terms. Consistent 
with the EO regulatory analysis requirements, our effects analysis 
under the Act may take into consideration impacts to both directly and 
indirectly affected entities, where practicable and reasonable. If 
sufficient data are available, we assess to the extent practicable the 
probable impacts to both directly and indirectly affected entities. As 
part of our screening analysis, we considered the types of economic 
activities that are likely to occur within the areas likely affected by 
the critical habitat designation. In our evaluation of the probable 
incremental economic impacts that may result from the proposed 
designation of critical habitat for the bracted twistflower, first we 
identified, in the IEM dated October 8, 2020, probable incremental 
economic impacts associated with potential activities based upon our 
knowledge of future projects and past consultations. Critical habitat 
designation generally will not affect activities that do not have any 
Federal involvement; under the Act, a designation of critical habitat 
only affects activities conducted, funded, permitted, or authorized by 
Federal agencies. If we list the species, in areas where the bracted 
twistflower is present, Federal agencies would be required to consult 
with the Service under section 7 of the Act on activities they fund, 
permit, or implement that may affect the species. If, when we list the 
species, we also finalize this proposed critical habitat designation, 
our consultation would include an evaluation of measures to avoid the 
destruction or adverse modification of critical habitat.
    In our IEM, we attempted to clarify the distinction between the 
effects that would result from the species being listed and those 
attributable to the critical habitat designation (i.e., difference 
between the jeopardy and adverse modification standards) for the 
bracted twistflower's critical habitat. Because the designation of 
critical habitat for the bracted twistflower was proposed concurrently 
with the listing, it has been our experience that it is more difficult 
to discern which conservation efforts are attributable to the species 
being listed and those which will result solely from the designation of 
critical habitat. However, the following specific circumstances in this 
case help to inform our evaluation: (1) The essential physical or 
biological features identified for critical habitat are the

[[Page 62689]]

same features essential for the life requisites of the species, and (2) 
any actions that would result in sufficient harm or harassment to 
constitute jeopardy to the bracted twistflower would also likely 
adversely affect the essential physical or biological features of 
critical habitat. The IEM outlines our rationale concerning this 
limited distinction between baseline conservation efforts and 
incremental impacts of the designation of critical habitat for this 
species. This evaluation of the incremental effects has been used as 
the basis to evaluate the probable incremental economic impacts of this 
proposed designation of critical habitat.
    The proposed critical habitat designation for the bracted 
twistflower consists of approximately 1,607 ac (650 ha) of occupied 
habitat within three units. Unit 1 (Northeast) contains four subunits 
totaling 724.74 ac (293.30 ha), all owned by the City of Austin. Unit 2 
(Central) contains four subunits totaling 536.79 ac (217.22 ha); two 
subunits are owned by the City of San Antonio, and two are privately 
owned. Unit 3 (Southwest) contains 345.23 ac (139.71 ha) that are 
within Garner State Park and managed by Texas Parks and Wildlife 
Department.
    All proposed critical habitat units are occupied by the species; 
therefore, any activities with a Federal nexus in the proposed critical 
habitat area that may affect the species would be subject to section 7 
consultation regardless of whether critical habitat is designated. It 
is unlikely that any additional conservation efforts would be 
recommended to address the adverse modification standard over and above 
those recommended as necessary to avoid jeopardizing the continued 
existence of the bracted twistflower. As a result, critical habitat is 
not expected to result in additional consultations beyond those 
required due to the presence of the species. Therefore, only 
administrative costs are expected within the proposed critical habitat 
designation. While this additional analysis will require time and 
resources by both the Federal action agency and the Service, it is 
believed that these costs would predominantly be administrative in 
nature and would not be significant. The entities most likely to incur 
incremental costs are parties to section 7 consultations, including 
Federal action agencies, State agencies or municipalities, and, in some 
cases, third parties.
    Overall, future consultation activity within the proposed critical 
habitat area is likely to be very limited, but may include the 
following categories: (1) Land restoration of enhancement; (2) 
agriculture; (3) development; (4) transmission line construction; (5) 
oil or gas pipelines; (6) transportation; and (7) stream modification. 
The majority (99 percent) of the proposed critical habitat area is 
within protected areas and conservation lands. The consultation history 
indicates that few projects and activities have occurred within 
critical habitat and within the broader range of the species over the 
past 9 years. Future consultations within the proposed critical habitat 
units are anticipated to range from zero to 0.1 formal consultations 
per year, 0.1 to 0.4 informal consultations per year, and zero to 0.9 
technical assistance efforts per year. Based on the average annual rate 
of consultations, the incremental administrative costs of consultation 
for the proposed critical habitat units may range from $280 to $2,100 
in an average year (IEc 2020, p. 15).
    We are soliciting data and comments from the public on the DEA 
discussed above, as well as on all aspects of this proposed rule and 
our required determinations.
    During the development of a final designation, we will consider the 
information presented in the DEA and any additional information on 
economic impacts we receive during the public comment period to 
determine whether any specific areas should be excluded from the final 
critical habitat designation under authority of section 4(b)(2) and our 
implementing regulations at 50 CFR 17.90. If we receive credible 
information regarding the existence of a meaningful economic or other 
relevant impact supporting a benefit of exclusion, we will conduct an 
exclusion analysis for the relevant area or areas. We may also exercise 
the discretion to evaluate any other particular areas for possible 
exclusion. Furthermore, when we conduct an exclusion analysis based on 
impacts identified by experts in, or sources with firsthand knowledge 
about, impacts that are outside the scope of the Service's expertise, 
we will give weight to those impacts consistent with the expert or 
firsthand information unless we have rebutting information. We may 
exclude an area from critical habitat if we determine that the benefits 
of excluding the area outweigh the benefits of including the area, 
provided the exclusion will not result in the extinction of this 
species. We may exclude an area from critical habitat if we determine 
that the benefits of excluding the area outweigh the benefits of 
including the area, provided the exclusion will not result in the 
extinction of this species.

Consideration of National Security Impacts

    Section 4(a)(3)(B)(i) of the Act may not cover all DoD lands or 
areas that pose potential national-security concerns (e.g., a DoD 
installation that is in the process of revising its INRMP for a newly 
listed species or a species previously not covered). If a particular 
area is not covered under section 4(a)(3)(B)(i), then national-security 
or homeland-security concerns are not a factor in the process of 
determining what areas meet the definition of ``critical habitat.'' 
However, the Service must still consider impacts on national security, 
including homeland security, on those lands or areas not covered by 
section 4(a)(3)(B)(i), because section 4(b)(2) requires the Service to 
consider those impacts whenever it designates critical habitat. 
Accordingly, if DoD, Department of Homeland Security (DHS), or another 
Federal agency has requested exclusion based on an assertion of 
national-security or homeland-security concerns, or we have otherwise 
identified national-security or homeland-security impacts from 
designating particular areas as critical habitat, we generally have 
reason to consider excluding those areas.
    However, we cannot automatically exclude requested areas. When DoD, 
DHS, or another Federal agency requests exclusion from critical habitat 
on the basis of national-security or homeland-security impacts, we must 
conduct an exclusion analysis if the Federal requester provides 
credible information, including a reasonably specific justification of 
an incremental impact on national security that would result from the 
designation of that specific area as critical habitat. That 
justification could include demonstration of probable impacts, such as 
impacts to ongoing border-security patrols and surveillance activities, 
or a delay in training or facility construction, as a result of 
compliance with section 7(a)(2) of the Act. If the agency requesting 
the exclusion does not provide us with a reasonably specific 
justification, we will contact the agency to recommend that it provide 
a specific justification or clarification of its concerns relative to 
the probable incremental impact that could result from the designation. 
If we conduct an exclusion analysis because the agency provides a 
reasonably specific justification or because we decide to exercise the 
discretion to conduct an exclusion analysis, we will defer to the 
expert judgment of DoD, DHS, or another Federal agency as to: (1) 
Whether activities on its lands or waters, or its activities on other 
lands or

[[Page 62690]]

waters, have national-security or homeland-security implications; (2) 
the importance of those implications; and (3) the degree to which the 
cited implications would be adversely affected in the absence of an 
exclusion. In that circumstance, in conducting a discretionary section 
4(b)(2) exclusion analysis, we will give great weight to national-
security and homeland-security concerns in analyzing the benefits of 
exclusion.
    Under section 4(b)(2) of the Act, we also consider whether where a 
national-security or homeland-security impact might exist on lands not 
owned or managed by DoD or DHS. In preparing this proposal, we have 
determined that, other than the land exempted under section 
4(a)(3)(B)(i) of the Act based upon the existence of an approved INRMP 
(see Exemptions, above), the lands within the proposed designation of 
critical habitat for the bracted twistflower are not owned or managed 
by DoD or DHS. Therefore, we anticipate no impact on national security. 
However, if through the public comment period we receive credible 
information regarding impacts on national security or homeland security 
from designating particular areas as critical habitat, then as part of 
developing the final designation of critical habitat, we will conduct a 
discretionary exclusion analysis to determine whether to exclude those 
areas under authority of section 4(b)(2) and our implementing 
regulations at 50 CFR 17.90.

Consideration of Other Relevant Impacts

    Under section 4(b)(2) of the Act, we consider any other relevant 
impacts, in addition to economic impacts and impacts on national 
security discussed above. We consider a number of factors including 
whether there are permitted conservation plans covering the species in 
the area such as HCPs, safe harbor agreements (SHAs), or candidate 
conservation agreements with assurances (CCAAs), or whether there are 
non-permitted conservation agreements and partnerships that would be 
encouraged by designation of, or exclusion from, critical habitat. In 
addition, we look at the existence of Tribal conservation plans and 
partnerships and consider the government-to-government relationship of 
the United States with Tribal entities. We also consider any social 
impacts that might occur because of the designation. No Tribal lands 
are included in the critical habitat designation for the bracted 
twistflower.
    We are not considering any exclusions at this time from the 
proposed designation under section 4(b)(2) of the Act based on 
partnerships, management, or protection afforded by cooperative 
management efforts. When analyzing the benefits of including or 
excluding particular areas covered by conservation plans, agreements, 
or partnerships permitted under section 10 of the Act, we consider 
whether the species for which critical habitat is being designated is a 
covered species in the conservation plan or agreement and whether the 
conservation plan or agreement specifically addressed the habitat of 
the species (50 CFR 17.90(3)). Within the proposed critical habitat 
units, there is currently one HCP being implemented, the Balcones 
Canyonlands Preserve HCP; however, this HCP does not include the 
bracted twistflower. Rather, the HCP explicitly states that the bracted 
twistflower will not be adequately protected by the plan (BCP 1996, pp. 
7, 9). Here, the bracted twistflower does have similar habitat 
requirements to those species covered by the Balcones Canyonlands 
Preserve HCP, but the HCP specifically states that several of those 
habitats will be destroyed by the actions taken in the HCP's planning 
area. Accordingly, the HCP does not adequately address the habitat of 
the bracted twistflower or meet its conservation needs in its planning 
area, and, therefore, the HCP's covered area should not be considered 
for exclusion here.
    We also analyze the benefits of including or excluding particular 
areas covered by conservation plans, agreements, or partnerships that 
have not been authorized by a permit under section 10 of the Act (50 
CFR 17.90(4)). A non-binding, non-obligatory memorandum of agreement 
(MOA) to work cooperatively at efforts to conserve the bracted 
twistflower between the Service, Texas Parks and Wildlife Department, 
City of Austin, Travis County, Lower Colorado River Authority, and the 
Ladybird Johnson Wildflower Center was entered into in 2004. When 
analyzing the benefits of including or excluding these areas, we 
analyze the degree to which the plan or agreement provides for the 
conservation of the physical or biological features that are essential 
to the conservation of the species (50 CFR 17.90(4)(vi)). The MOA has 
benefited conservation of the bracted twistflower, but does not address 
all of the species' essential physical and biological features; 
specifically, it does not address encroachment and competition from 
Ashe juniper. Scientific studies that revealed the species' requirement 
for exposure to direct sunlight were not published until after the MOA 
was finalized in 2004 (Fowler 2010, pp. 1-18; Leonard 2010, pp. 1-86; 
Ramsey 2010, pp. 1-35; Leonard and Van Auken 2013, pp. 276-285). 
Consequently, the critical habitat designation would enhance ongoing 
conservation efforts, and the potential benefit of exclusion does not 
outweigh the benefit of inclusion.
    We have not identified any areas to consider for exclusion from 
critical habitat based on other relevant impacts. However, during the 
development of a final designation, we will consider all information 
currently available or received during the public comment period. If we 
receive credible information regarding the existence of a meaningful 
impact supporting a benefit of excluding any areas, we will undertake 
an exclusion analysis and determine whether those areas should be 
excluded from the final critical habitat designation under the 
authority of section 4(b)(2) and our implementing regulations at 50 CFR 
17.90. We may also exercise the discretion to undertake exclusion 
analyses for other areas as well, and we will describe all of our 
exclusion analyses as part of a final critical habitat determination.

Summary of Exclusions Considered Under 4(b)(2) of the Act

    At this time we are not considering any exclusions from the 
proposed designation based on economic impacts, national security 
impacts, or other relevant impacts--such as partnerships, management, 
or protection afforded by cooperative management efforts--under section 
4(b)(2) of the Act. Some areas within the proposed designation are 
included in Balcones Canyonlands Preserve HCP and within a memorandum 
of agreement (MOA) between the Service, Texas Parks and Wildlife 
Department, City of Austin, Travis County, Lower Colorado River 
Authority, and the Ladybird Johnson Wildflower Center. In this proposed 
rule, we are seeking credible information from the public regarding the 
existence of a meaningful impact supporting a benefit of excluding any 
areas that would be used in an exclusion analysis that may result in 
the exclusion of areas from the final critical habitat designation. 
(Please see ADDRESSES for instructions on how to submit comments).

[[Page 62691]]

Required Determinations

Clarity of the Rule

    We are required by Executive Orders 12866 and 12988 and by the 
Presidential Memorandum of June 1, 1998, to write all rules in plain 
language. This means that each rule we publish must:
    (1) Be logically organized;
    (2) Use the active voice to address readers directly;
    (3) Use clear language rather than jargon;
    (4) Be divided into short sections and sentences; and
    (5) Use lists and tables wherever possible.
    If you feel that we have not met these requirements, send us 
comments by one of the methods listed in ADDRESSES. To better help us 
revise the rule, your comments should be as specific as possible. For 
example, you should tell us the numbers of the sections or paragraphs 
that are unclearly written, which sections or sentences are too long, 
the sections where you feel lists or tables would be useful, etc.

Regulatory Planning and Review (Executive Orders 12866 and 13563)

    Executive Order 12866 provides that the Office of Information and 
Regulatory Affairs (OIRA) in the Office of Management and Budget will 
review all significant rules. OIRA has determined that this rule is not 
significant.
    Executive Order 13563 reaffirms the principles of EO 12866 while 
calling for improvements in the nation's regulatory system to promote 
predictability, to reduce uncertainty, and to use the best, most 
innovative, and least burdensome tools for achieving regulatory ends. 
The executive order directs agencies to consider regulatory approaches 
that reduce burdens and maintain flexibility and freedom of choice for 
the public where these approaches are relevant, feasible, and 
consistent with regulatory objectives. EO 13563 emphasizes further that 
regulations must be based on the best available science and that the 
rulemaking process must allow for public participation and an open 
exchange of ideas. We have developed this proposed rule in a manner 
consistent with these requirements.

Regulatory Flexibility Act (5 U.S.C. 601 et seq.)

    Under the Regulatory Flexibility Act (RFA; 5 U.S.C. 601 et seq.), 
as amended by the Small Business Regulatory Enforcement Fairness Act of 
1996 (SBREFA; 5 U.S.C. 801 et seq.), whenever an agency is required to 
publish a notice of rulemaking for any proposed or final rule, it must 
prepare and make available for public comment a regulatory flexibility 
analysis that describes the effects of the rule on small entities 
(i.e., small businesses, small organizations, and small government 
jurisdictions). However, no regulatory flexibility analysis is required 
if the head of the agency certifies the rule will not have a 
significant economic impact on a substantial number of small entities. 
The SBREFA amended the RFA to require Federal agencies to provide a 
certification statement of the factual basis for certifying that the 
rule will not have a significant economic impact on a substantial 
number of small entities.
    According to the Small Business Administration, small entities 
include small organizations such as independent nonprofit 
organizations; small governmental jurisdictions, including school 
boards and city and town governments that serve fewer than 50,000 
residents; and small businesses (13 CFR 121.201). Small businesses 
include manufacturing and mining concerns with fewer than 500 
employees, wholesale trade entities with fewer than 100 employees, 
retail and service businesses with less than $5 million in annual 
sales, general and heavy construction businesses with less than $27.5 
million in annual business, special trade contractors doing less than 
$11.5 million in annual business, and agricultural businesses with 
annual sales less than $750,000. To determine whether potential 
economic impacts to these small entities are significant, we considered 
the types of activities that might trigger regulatory impacts under 
this designation as well as types of project modifications that may 
result. In general, the term ``significant economic impact'' is meant 
to apply to a typical small business firm's business operations.
    Under the RFA, as amended, and as understood in light of recent 
court decisions, Federal agencies are required to evaluate the 
potential incremental impacts of rulemaking on those entities directly 
regulated by the rulemaking itself; in other words, the RFA does not 
require agencies to evaluate the potential impacts to indirectly 
regulated entities. The regulatory mechanism through which critical 
habitat protections are realized is section 7 of the Act, which 
requires Federal agencies, in consultation with the Service, to ensure 
that any action authorized, funded, or carried out by the agency is not 
likely to destroy or adversely modify critical habitat. Therefore, 
under section 7, only Federal action agencies are directly subject to 
the specific regulatory requirement (avoiding destruction and adverse 
modification) imposed by critical habitat designation. Consequently, it 
is our position that only Federal action agencies would be directly 
regulated if we adopt the proposed critical habitat designation. The 
RFA does not require evaluation of the potential impacts to entities 
not directly regulated. Moreover, Federal agencies are not small 
entities. Therefore, because no small entities would be directly 
regulated by this rulemaking, the Service certifies that, if made final 
as proposed, the proposed critical habitat designation will not have a 
significant economic impact on a substantial number of small entities.
    In summary, we have considered whether the proposed designation 
would result in a significant economic impact on a substantial number 
of small entities. For the above reasons and based on currently 
available information, we certify that, if made final, the proposed 
critical habitat designation would not have a significant economic 
impact on a substantial number of small business entities. Therefore, 
an initial regulatory flexibility analysis is not required.

Energy Supply, Distribution, or Use--Executive Order 13211

    Executive Order 13211 (Actions Concerning Regulations That 
Significantly Affect Energy Supply, Distribution, or Use) requires 
agencies to prepare Statements of Energy Effects when undertaking 
certain actions. In our economic analysis, we did not find that this 
proposed critical habitat designation would significantly affect energy 
supplies, distribution, or use. Therefore, this action is not a 
significant energy action, and no Statement of Energy Effects is 
required.

Unfunded Mandates Reform Act (2 U.S.C. 1501 et seq.)

    In accordance with the Unfunded Mandates Reform Act (2 U.S.C. 1501 
et seq.), we make the following finding:
    (1) This proposed rule would not produce a Federal mandate. In 
general, a Federal mandate is a provision in legislation, statute, or 
regulation that would impose an enforceable duty upon State, local, or 
Tribal governments, or the private sector, and includes both ``Federal 
intergovernmental mandates'' and ``Federal private sector mandates.'' 
These terms are defined in 2 U.S.C. 658(5)-(7). ``Federal 
intergovernmental mandate'' includes a regulation that ``would impose 
an enforceable duty upon State, local, or Tribal governments'' with two 
exceptions. It excludes ``a condition of Federal

[[Page 62692]]

assistance.'' It also excludes ``a duty arising from participation in a 
voluntary Federal program,'' unless the regulation ``relates to a then-
existing Federal program under which $500,000,000 or more is provided 
annually to State, local, and Tribal governments under entitlement 
authority,'' if the provision would ``increase the stringency of 
conditions of assistance'' or ``place caps upon, or otherwise decrease, 
the Federal Government's responsibility to provide funding,'' and the 
State, local, or Tribal governments ``lack authority'' to adjust 
accordingly. At the time of enactment, these entitlement programs were: 
Medicaid; Aid to Families with Dependent Children work programs; Child 
Nutrition; Food Stamps; Social Services Block Grants; Vocational 
Rehabilitation State Grants; Foster Care, Adoption Assistance, and 
Independent Living; Family Support Welfare Services; and Child Support 
Enforcement. ``Federal private sector mandate'' includes a regulation 
that ``would impose an enforceable duty upon the private sector, except 
(i) a condition of Federal assistance or (ii) a duty arising from 
participation in a voluntary Federal program.''
    The designation of critical habitat does not impose a legally 
binding duty on non-Federal Government entities or private parties. 
Under the Act, the only regulatory effect is that Federal agencies must 
ensure that their actions do not destroy or adversely modify critical 
habitat under section 7. While non-Federal entities that receive 
Federal funding, assistance, or permits, or that otherwise require 
approval or authorization from a Federal agency for an action, may be 
indirectly impacted by the designation of critical habitat, the legally 
binding duty to avoid destruction or adverse modification of critical 
habitat rests squarely on the Federal agency. Furthermore, to the 
extent that non-Federal entities are indirectly impacted because they 
receive Federal assistance or participate in a voluntary Federal aid 
program, the Unfunded Mandates Reform Act would not apply, nor would 
critical habitat shift the costs of the large entitlement programs 
listed above onto State governments.
    (2) We do not believe that this rule would significantly or 
uniquely affect small governments because the lands being proposed for 
critical habitat designations are primarily owned by the cities of 
Austin and San Antonio or the State of Texas and none of these 
government entities fits the definition of ``small governmental 
jurisdiction.'' Therefore, a Small Government Agency Plan is not 
required.

Takings--Executive Order 12630

    In accordance with EO 12630 (Government Actions and Interference 
with Constitutionally Protected Private Property Rights), we have 
analyzed the potential takings implications of designating critical 
habitat for the bracted twistflower in a takings implications 
assessment. The Act does not authorize the Service to regulate private 
actions on private lands or confiscate private property as a result of 
critical habitat designation. Designation of critical habitat does not 
affect land ownership, or establish any closures, or restrictions on 
use of or access to the designated areas. Furthermore, the designation 
of critical habitat does not affect landowner actions that do not 
require Federal funding or permits, nor does it preclude development of 
habitat conservation programs or issuance of incidental take permits to 
permit actions that do require Federal funding or permits to go 
forward. However, Federal agencies are prohibited from carrying out, 
funding, or authorizing actions that would destroy or adversely modify 
critical habitat. A takings implications assessment has been completed 
for the proposed designation of critical habitat for the bracted 
twistflower, and it concludes that, if adopted, this designation of 
critical habitat does not pose significant takings implications for 
lands within or affected by the designation.

Federalism--Executive Order 13132

    In accordance with EO 13132 (Federalism), this proposed rule does 
not have significant Federalism effects. A federalism summary impact 
statement is not required. In keeping with Department of the Interior 
and Department of Commerce policy, we requested information from, and 
coordinated development of this proposed critical habitat designation 
with, appropriate State resource agencies. From a federalism 
perspective, the designation of critical habitat directly affects only 
the responsibilities of Federal agencies. The Act imposes no other 
duties with respect to critical habitat, either for States and local 
governments, or for anyone else. As a result, the proposed rule does 
not have substantial direct effects either on the States, or on the 
relationship between the national government and the States, or on the 
distribution of powers and responsibilities among the various levels of 
government. The proposed designation may have some benefit to these 
governments because the areas that contain the features essential to 
the conservation of the species are more clearly defined, and the 
physical or biological features of the habitat necessary for the 
conservation of the species are specifically identified. This 
information does not alter where and what federally sponsored 
activities may occur. However, it may assist State and local 
governments in long-range planning because they no longer have to wait 
for case-by-case section 7 consultations to occur.
    Where State and local governments require approval or authorization 
from a Federal agency for actions that may affect critical habitat, 
consultation under section 7(a)(2) of the Act would be required. While 
non-Federal entities that receive Federal funding, assistance, or 
permits, or that otherwise require approval or authorization from a 
Federal agency for an action, may be indirectly impacted by the 
designation of critical habitat, the legally binding duty to avoid 
destruction or adverse modification of critical habitat rests squarely 
on the Federal agency.

Civil Justice Reform--Executive Order 12988

    In accordance with Executive Order 12988 (Civil Justice Reform), 
the Office of the Solicitor has determined that the rule would not 
unduly burden the judicial system and that it meets the requirements of 
sections 3(a) and 3(b)(2) of the Order. We have proposed designating 
critical habitat in accordance with the provisions of the Act. To 
assist the public in understanding the habitat needs of the species, 
this proposed rule identifies the physical or biological features 
essential to the conservation of the species. The proposed areas of 
critical habitat are presented on maps, and the proposed rule provides 
several options for the interested public to obtain more detailed 
location information, if desired.

Paperwork Reduction Act of 1995 (44 U.S.C. 3501 et seq.)

    This rule does not contain information collection requirements, and 
a submission to the Office of Management and Budget (OMB) under the 
Paperwork Reduction Act of 1995 (44 U.S.C. 3501 et seq.) is not 
required. We may not conduct or sponsor and you are not required to 
respond to a collection of information unless it displays a currently 
valid OMB control number.

National Environmental Policy Act (42 U.S.C. 4321 et seq.)

    It is our position that, outside the jurisdiction of the U.S. Court 
of Appeals for the Tenth Circuit, we do not need to prepare 
environmental analyses

[[Page 62693]]

pursuant to the National Environmental Policy Act (NEPA; 42 U.S.C. 4321 
et seq.) in connection with regulations adopted pursuant to section 
4(a) of the Act. We published a notice outlining our reasons for this 
determination in the Federal Register on October 25, 1983 (48 FR 
49244). This position was upheld by the U.S. Court of Appeals for the 
Ninth Circuit (Douglas County v. Babbitt, 48 F.3d 1495 (9th Cir. 1995), 
cert. denied 516 U.S. 1042 (1996)).

Government-to-Government Relationship With Tribes

    In accordance with the President's memorandum of April 29, 1994 
(Government-to-Government Relations with Native American Tribal 
Governments; 59 FR 22951), Executive Order 13175 (Consultation and 
Coordination with Indian Tribal Governments), and the Department of the 
Interior's manual at 512 DM 2, we readily acknowledge our 
responsibility to communicate meaningfully with recognized Federal 
Tribes on a government-to-government basis. In accordance with 
Secretarial Order 3206 of June 5, 1997 (American Indian Tribal Rights, 
Federal-Tribal Trust Responsibilities, and the Endangered Species Act), 
we readily acknowledge our responsibilities to work directly with 
Tribes in developing programs for healthy ecosystems, to acknowledge 
that Tribal lands are not subject to the same controls as Federal 
public lands, to remain sensitive to Indian culture, and to make 
information available to Tribes. We have determined that no Tribal 
lands fall within the boundaries of the proposed critical habitat for 
the bracted twistflower, so no Tribal lands would be affected by the 
proposed designation.

References Cited

    A complete list of references cited in this rulemaking is available 
on the internet at http://www.regulations.gov and upon request from the 
Austin Ecological Services Field Office (see FOR FURTHER INFORMATION 
CONTACT).

Authors

    The primary authors of this proposed rule are the staff members of 
the Fish and Wildlife Service's Species Assessment Team and the Austin 
Ecological Services Field Office.

List of Subjects in 50 CFR Part 17

    Endangered and threatened species, Exports, Imports, Plants, 
Reporting and recordkeeping requirements, Transportation.

Proposed Regulation Promulgation

    Accordingly, we propose to amend 50 CFR part 17 as set forth below:

PART 17--ENDANGERED AND THREATENED WILDLIFE AND PLANTS

0
1. The authority citation for part 17 continues to read as follows:

    Authority:  16 U.S.C. 1361-1407; 1531-1544; and 4201-4245, 
unless otherwise noted.

0
2. Amend Sec.  17.12(h) by adding an entry for ``Streptanthus 
bracteatus'' to the List of Endangered and Threatened Plants in 
alphabetical order under FLOWERING PLANTS to read as follows:


Sec.  17.  12 Endangered and threatened plants.

* * * * *
    (h) * * *

----------------------------------------------------------------------------------------------------------------
                                                                                          Listing citations and
         Scientific name              Common name          Where listed       Status        applicable rules
----------------------------------------------------------------------------------------------------------------
                   Flowering Plants
 
                                                  * * * * * * *
Streptanthus bracteatus.........  bracted twistflower  Wherever found.....          T   [Federal Register
                                                                                         citation when published
                                                                                         as a final rule]; 50
                                                                                         CFR 17.73(i); \4d\ 50
                                                                                         CFR 17.96(a).\CH\
 
                                                  * * * * * * *
----------------------------------------------------------------------------------------------------------------

0
3. Amend Sec.  17.73, as proposed to be amended at 85 FR 58224 
(September 17, 2020), 85 FR 61684 (September 30, 2020), 85 FR 66906 
(October 21, 2020), 86 FR 3976 (January 15, 2021), 86 FR 33159 (June 
24, 2021), and 86 FR 37091 (July 14, 2021), by adding paragraphs (h) 
and (i) to read as follows:


Sec.  17.73  Special rules--flowering plants.

* * * * *
    (h) [Reserved]
    (i) Streptanthus bracteatus (bracted twistflower). (1) 
Prohibitions. The following prohibitions that apply to endangered 
plants also apply to the bracted twistflower. Except as provided under 
paragraph (i)(2) of this section, it is unlawful for any person subject 
to the jurisdiction of the United States to commit, to attempt to 
commit, to solicit another to commit, or cause to be committed, any of 
the following acts in regard to this species:
    (i) Import or export, as set forth at Sec.  17.61(b) for endangered 
plants.
    (ii) Remove and reduce to possession from areas under Federal 
jurisdiction; maliciously damage or destroy the species on any such 
area; or remove, cut, dig up, or damage or destroy the species on any 
other area in knowing violation of any law or regulation of any State 
or in the course of any violation of a State criminal trespass law.
    (iii) Interstate or foreign commerce in the course of commercial 
activity, as set forth at Sec.  17.61(d) for endangered plants.
    (iv) Sale or offer for sale, as set forth at Sec.  17.61(e) for 
endangered plants.
    (2) Exceptions from prohibitions. In regard to this species, you 
may:
    (i) Conduct activities as authorized by a permit under Sec.  17.72.
    (ii) Any employee or agent of the Service or of a State 
conservation agency that is operating a conservation program pursuant 
to the terms of a cooperative agreement with the Service in accordance 
with section 6(c) of the Act, who is designated by that agency for such 
purposes, may, when acting in the course of official duties, remove and 
reduce to possession from areas under Federal jurisdiction members of 
bracted twistflower that are covered by an approved cooperative 
agreement to carry out conservation programs.
    (iii) Engage in any act prohibited under paragraph (i)(1) of this 
section with seeds of cultivated specimens, provided that a statement 
that the seeds are of ``cultivated origin'' accompanies the seeds or 
their container.
* * * * *
0
4. Amend Sec.  17.96(a) by adding an entry for ``Family Brassicaceae: 
Streptanthus bracteatus (bracted twistflower)'' in alphabetical order 
to read as follows:


Sec.  17.96  Critical habitat--plants.

    (a) * * *
    Family Brassicaceae: Streptanthus bracteatus (bracted twistflower)
    (1) Critical habitat units are depicted for Bexar, Medina, Travis, 
and Uvalde Counties, Texas, on the maps in this entry.

[[Page 62694]]

    (2) Within these areas, the physical or biological features 
essential to the conservation of the bracted twistflower consist of the 
following components:
    (i) Karstic, dolomitic limestones underlain by less permeable 
limestone strata, where perched aquifers seep to the surface along 
slopes. These are often found within 2 kilometers of the exposed 
boundary of the Edwards or Devils River and Glen Rose geological 
formations;
    (ii) Native, old-growth juniper-oak woodlands and shrublands along 
the Balcones Escarpment;
    (iii) Herbivory from white-tailed deer and introduced ungulates of 
such low intensity that it does not severely deplete populations prior 
to seed dispersal;
    (iv) Tree and shrub canopy gaps that allow direct sunlight to reach 
the herbaceous plant layer at least 6 hours per day; and
    (v) Viable populations of native bee species and the abundant, 
diverse forb and shrub understory that support them.
    (3) Critical habitat does not include manmade structures (such as 
buildings, aqueducts, runways, roads, and other paved areas) and the 
land on which they are located existing within the legal boundaries on 
the effective date of this rule.
    (4) Data layers defining map units were created using U.S. 
Geological Survey digital elevation models. For each unit/subunit, we 
determined the range of occupied elevations and the range of occupied 
slopes; critical habitat polygons consisted of the intersection of the 
occupied elevations and occupied slopes. The maps in this entry, as 
modified by any accompanying regulatory text, establish the boundaries 
of the critical habitat designation. The coordinates or plot points or 
both on which each map is based are available to the public at http://www.regulations.gov at Docket No. FWS-R2-ES-2021-0013, and at the field 
office responsible for this designation. You may obtain field office 
location information by contacting one of the Service regional offices, 
the addresses of which are listed at 50 CFR 2.2.
    (5) Note: Index map follows:
BILLING CODE 4333-15-P
[GRAPHIC] [TIFF OMITTED] TP10NO21.007

    (6) Unit 1: Northeast, Travis County, Texas.
    (i) Subunit 1a: Barton Creek Park/Wilderness Area.
    (A) Subunit 1a consists of 690.5 acres (ac) (279.44 hectares (ha)) 
in Travis County and is composed of lands along Barton Creek owned by 
the City of Austin Parks and Recreation Department and managed as a 
unit of the Balcones Canyonlands Preserve (BCP) system.
    (B) Map of Subunit 1a follows:

[[Page 62695]]

[GRAPHIC] [TIFF OMITTED] TP10NO21.008

    (ii) Subunit 1b: Bull Creek Park.
    (A) Subunit 1b consists of 2.32 ac (0.94 ha) in Travis County and 
is composed of lands owned by the City of Austin Parks and Recreation

[[Page 62696]]

Department and managed as a unit of the BCP system.
    (B) Map of Subunit 1b follows:
    [GRAPHIC] [TIFF OMITTED] TP10NO21.009
    

[[Page 62697]]


    (iii) Subunit 1c: Mount Bonnell Park.
    (A) Subunit 1c consists of 2 ac (0.81 ha) in Travis County and is 
composed of lands owned by the City of Austin Parks and Recreation 
Department and managed as a unit of the BCP system.
    (B) Map of Subunit 1c follows:
    [GRAPHIC] [TIFF OMITTED] TP10NO21.010
    

[[Page 62698]]


    (iv) Subunit 1d: Ullrich Water Treatment Plant/Bee Creek Park.
    (A) Subunit 1d consists of 29.92 ac (12.11 ha) in Travis County and 
is composed of lands owned by the City of Austin Water Utility, a 
portion of which is managed as a BCP Habitat Management Area.
    (B) Map of Subunit 1d follows:

[[Page 62699]]

[GRAPHIC] [TIFF OMITTED] TP10NO21.011

    (7) Unit 2: Central, Bexar, and Medina Counties, Texas.
    (i) Subunit 2a: Eisenhower Park.
    (A) Subunit 2a consists of 78.16 ac (31.63 ha) in Bexar County and 
is

[[Page 62700]]

composed of lands owned by the City of San Antonio and managed by San 
Antonio Parks and Recreation Department (SAPRD).
    (B) Map of Subunit 2a follows:
    [GRAPHIC] [TIFF OMITTED] TP10NO21.012
    

[[Page 62701]]


    (ii) Subunit 2b: Rancho Diana.
    (A) Subunit 2b consists of 395.73 ac (160.15 ha) in Bexar County 
and is composed of lands owned and managed by the City of San Antonio.
    (B) Map of Subunit 2b follows:
    [GRAPHIC] [TIFF OMITTED] TP10NO21.013
    

[[Page 62702]]


    (iii) Subunit 2c: Laurel Canyon Ranch Conservation Easement.
    (A) Subunit 2c consists of 39.59 ac (16.02 ha) in Medina County and 
is composed of private property owned by Laurel C. Canyon Ranch, LP. 
The City of San Antonio Edwards Aquifer Protection Program holds a 
conservation easement on 222 ha (549 ac) of Laurel Canyon Ranch.
    (B) Map of Subunit 2c follows:
    [GRAPHIC] [TIFF OMITTED] TP10NO21.014
    
    (iv) Subunit 2d: Medina River.
    (A) Subunit 2d consists of 23.28 ac (9.42 ha) in Medina County and 
is composed of private property owned by Medina Ranch Inc.
    (B) Map of Subunit 2d follows:

[[Page 62703]]

[GRAPHIC] [TIFF OMITTED] TP10NO21.015

    (8) Unit 3: Southwest; Garner State Park, Uvalde County, Texas.
    (i) Unit 3 consists of 345.22 ac (139.71 ha) in Uvalde County and 
is composed of lands within Garner State Park, which is managed by 
Texas Parks and Wildlife Department.
    (ii) Map of Unit 3 follows:

[[Page 62704]]

[GRAPHIC] [TIFF OMITTED] TP10NO21.016


[[Page 62705]]


* * * * *

Martha Williams,
Principal Deputy Director, Exercising the Delegated Authority of the 
Director, U.S. Fish and Wildlife Service.
[FR Doc. 2021-24343 Filed 11-9-21; 8:45 am]
BILLING CODE 4333-15-C