Descurainia torulosa - Rollins
Wyoming Tansy-mustard
Taxonomic Status: Accepted
Related ITIS Name(s): Descurainia torulosa Rollins (TSN 502006)
Unique Identifier: ELEMENT_GLOBAL.2.156766
Element Code: PDBRA0X070
Informal Taxonomy: Plants, Vascular - Flowering Plants - Mustard Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Capparales Brassicaceae Descurainia
Check this box to expand all report sections:
Concept Reference
Help
Concept Reference: Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Concept Reference Code: B94KAR01HQUS
Name Used in Concept Reference: Descurainia torulosa
Conservation Status
Help

NatureServe Status

Global Status: G2
Global Status Last Reviewed: 17Jul2010
Global Status Last Changed: 17Jul2010
Rounded Global Status: G2 - Imperiled
Reasons: Known only from the high volcanic mountains of the Absaroka Range (northwest Wyoming) and isolated buttes in the Great Divide Basin (Pine Butte; Lions Bluff in southwest Wyoming). Thirteen small occurrences have been documented and much suitable habitat has not yet been searched. Populations tend to be very small in area and number of individuals and may fluctuate greatly from year to year. The species is largely protected from human disturbance by its rugged habitat, but is vulnerable to extinction due to intrinsic habitat instability and natural population fluctuations.
Nation: United States
National Status: N2

U.S. & Canada State/Province Status
United States Wyoming (S2)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: Endemic to Wyoming in the northern and southern Absaroka Range (Fremont, Park and Teton counties), and isolated buttes in the Great Divide Basin (Sweetwater County).

Area of Occupancy: 3-500 4-km2 grid cells
Area of Occupancy Comments: Each occurrence occupies less than 1 acre, though some are scattered along more than one cliff base segment or setting.

Number of Occurrences: 1 - 20
Number of Occurrences Comments: There are 13 occurrences, but only the type collection was accepted by Rollins as representing the taxon. One occurrence is based on an immature specimen warranting verification (Carter Mountain). In addition, it is possible that there are taxonomic distinctions between the ten northern and the three southern occurrences.

Population Size Comments: A tally of population estimates indicates that there have been ca. 1090 reproductive plants (and at least 385 vegetative plants), with no estimates available for 4 of the 13 occurrences.

Number of Occurrences with Good Viability/Integrity: None to few (0-12)

Overall Threat Impact: High
Overall Threat Impact Comments: Populations are relatively inaccessible. Destabilization of the cliff face above or talus slope below may affect the species for better or worse. This may be part of natural erosion cycle, or induced by nearby construction, or by seismic activities as at the BLM occurrences. It is unlikely to affect all occurrences or groups of occurrneces unless linked to climate.

Short-term Trend Comments: Declines have been linked to drought conditions (Dorn 1989, Amidon personal communiation).

Intrinsic Vulnerability Comments: Possibly vulnerable to rock slides and drought cycles, compounded by environmental specificity and short life cycle. Descurainia torulosa is a biennial or short-lived perennial. It is not known whether it has a seedbank.

Environmental Specificity: Very narrow. Specialist or community with key requirements scarce.
Environmental Specificity Comments: Restricted to a narrow zone of sheltered cliff base habitat.

Other NatureServe Conservation Status Information

Distribution
Help
Global Range: Endemic to Wyoming in the northern and southern Absaroka Range (Fremont, Park and Teton counties), and isolated buttes in the Great Divide Basin (Sweetwater County).

U.S. States and Canadian Provinces
Color legend for Distribution Map

U.S. & Canada State/Province Distribution
United States WY

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
WY Fremont (56013), Park (56029), Sweetwater (56037), Teton (56039)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
10 Clarks Fork Yellowstone (10070006)+*, Upper Wind (10080001)+, Greybull (10080009)+, North Fork Shoshone (10080012)+, South Fork Shoshone (10080013)+
14 Bitter (14040105)+
17 Snake headwaters (17040101)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
Help
Basic Description: A short-lived perennial herb with multiple stems to 1.5 dm tall arising from a cluster of compound basal leaves. Stems and leaves are gray-green with finely divided, star-like hairs. Tiny yellow flowers bloom in June and July. Fruits are linear, hairy, 8-15 mm long, and typically constricted between the seeds.
Terrestrial Habitat(s): Bare rock/talus/scree
Habitat Comments: Volcanic scree or sparsely vegetated sandy slopes at the base of cliffs at 2440-3300 m elevation.
Economic Attributes Not yet assessed
Help
Management Summary Not yet assessed
Help
Population/Occurrence Delineation Not yet assessed
Help
Population/Occurrence Viability
Help
U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
Help
Authors/Contributors
Help
NatureServe Conservation Status Factors Edition Date: 02Apr2005
NatureServe Conservation Status Factors Author: B. Heidel

Botanical data developed by NatureServe and its network of natural heritage programs (see Local Programs), The North Carolina Botanical Garden, and other contributors and cooperators (see Sources).

References
Help
  • Amidon, Barbara. 1994. Special status plant species in the Rock Springs District, BLM. Memo updated 9-30-94.

  • Andersen, M.D. and B. Heidel. 2011. HUC-based species range maps. Prepared by Wyoming Natural Diversity Database for use in the pilot WISDOM application operational from inception to yet-to-be-determined date of update of tool.

  • Bricker, J. S. and G. K. Brown. 1998. ITS-RFLP (Restriction Fragment Length Polymorphism) analysis of Descurainia torulosa (Brassicaceae). Unpublished report prepared for the Bureau of Land Management Wyoming State Office by the Department of Botany, University of Wyoming, Laramie, WY.

  • Bricker, J. S., G. K. Brown, and T. L. P. Lewis. 2000. Status of Descurainia torulosa (Brassicaceae). Western North American Naturalist 60:426-432.

  • Clark, T. W., A. H. Harvey, R. D. Dorn, D. L. Genter, and C. Groves. 1989. Rare, sensitive, and threatened species of the Greater Yellowstone Ecosystem. Northern Rockies Conservation Cooperative, Montana Natural Heritage Program, The Nature Conservancy, and Mountain West Environmental Services.

  • Croft, L.K., W.R. Owen, and J.S. Shelly. 1997. Interior Columbia Basin Ecosystem Management Project Analysis of Vascular Plants. US Forest Service.

  • Detling, L. E. 1939. A revision of the North American species of Descurainia. American Midland Naturalist 22:481-520.

  • Dorn, R. D. 1989. Report on the status of Descurainia torulosa, a Candidate Threatened species. Unpublished report prepared for the U.S. Fish and Wildlife Service by Mountain West Environmental Services, Cheyenne, WY.

  • Dorn, R. D. 2001. Vascular Plants of Wyoming, third edition. Mountain West Publishing, Cheyenne, WY.

  • Dorn, R.D. 1989. Report on the status of Descurainia torulosa, a candidate Threatened species. Unpublished report prepared for the U.S. Fish and Wildlife Service.

  • Elliott, B. 2012. Greybull noxious weed and Descurainia torulosa surveys, Shoshone National Forest. Prepared for Shoshone National Forest. Elliott Environmental Consulting, Laramie, WY.

  • Evert, E. F. 2010. Vascular Plants of the Greater Yellowstone Area: Annotated Catalog and Atlas. Park Ridge, IL.

  • Fertig, W. 2000. State Species Abstract: Descurainia torulosa. Wyoming Natural Diversity Database. Available on the internet at www.uwyo.edu/wyndd.

  • Fertig, W. 1992. Checklist of the vascular plant flora of the west slope of the Wind River Range and status report on the sensitive plant species of Bridger-Teton National Forest. Unpublished report prepared for the Bridger-Teton National Forest by the Rocky Mountain Herbarium, University of Wyoming, Laramie, WY.

  • Fertig, W. 1992. Sensitive plant species surveys and revised species checklist, Grass Creek Resource Area, BLM. Unpublished report prepared for the Bureau of Land Management, Grass Creek Resource Area, by the Wyoming Natural Diversity Database, Laramie, WY.

  • Fertig, W. 1993. U. S. Fish and Wildlife Service candidate plant species of Wyoming. Unpublished report prepared for Wyoming Weed and Pest Supervisor's meeting in Cody, WY, March 1993.

  • Fertig, W. 1994. Guide to Sensitive Wyoming plants of US Forest Service Region 2 (with emphasis on plants of Bighorn, Medicine Bow, and Shoshone National Forests). Unpublished report prepared as a handout for the TES species identification workshop conducted for US Forest Service Region 2 in Laramie, WY, 11 May 1994.

  • Fertig, W. 1995. Report on the potential vulnerability of Shoshone National Forest Candidate and Sensitive plant species to livestock grazing. Unpublished report prepared for the Shoshone National Forest by the Wyoming Natural Diversity Database, Laramie, WY.

  • Fertig, W. 1997. Plant species of special concern on Shoshone National Forest: 1996 survey results. Unpublished report prepared by the Wyoming Natural Diversity Database, Laramie, WY.

  • Fertig, W. 1998. The status of rare plants on Shoshone National Forest: 1995-97 survey results. Unpublished report prepared for the Shoshone National Forest by the Wyoming Natural Diversity Database, Laramie, WY.

  • Fertig, W. 2000. Rare vascular plant species in the Wyoming portion of the Utah-Wyoming Rocky Mountains Ecoregion. Prepared for the Wyoming Nature Conservancy by the Wyoming Natural Diversity Database, Laramie, WY.

  • Fertig, W. and R. Thurston. 2003. Modeling the potential distribution of BLM Sensitive and USFWS Threatened and Endangered plant species in Wyoming. Unpublished report prepared for the Bureau of Land Management Wyoming State Office by the Wyoming Natural Diversity Database, Laramie, WY.

  • Fertig, W., C. Refsdal, and J. Whipple. 1994. Wyoming Rare Plant Field Guide. Wyoming Rare Plant Technical Committee, Cheyenne, WY.

  • Fertig, W., C. Refsdal, and J. Whipple. 1994. Wyoming rare plant field guide. Wyoming Rare Plant Technical Committee, Cheyenne. No pagination.

  • Fertig, W., L. Welp, and S. Markow. 1998. The status of rare plants in southwest Wyoming. Unpublished report prepared for the Bureau of Land Management by the Wyoming Natural Diversity Database, Laramie, WY.

  • Heidel, B. 2004. Descurainia torulosa (Wind River tansymustard): A Technical Conservation Assessment. USDA Forest Service, Rocky Mountain Region. http://www.fs.fed.us/r2/projects/scp/assessments/Descurainiatorulosa.pdf.

  • Houston, K.E., W.J. Hartung and C.J. Hartung. 2001. A field guide for forest indicator plants, sensitive plants, and noxious weeds of the Shoshone National Forest, Wyoming. Gen. Tech. Rep. RMRS-GTR-84, Ogden, UT: USDA Forest Service Rocky Mountain Research Station.

  • Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

  • Marriott, H. J. 1988. Draft habitat management plan for threatened, endangered and sensitive plant species and their habitats on the Rock Springs District, Bureau of Land Management. Unpublished report prepared for the Bureau of Land Management by the Wyoming Natural Diversity Database, Laramie, WY.

  • Marriott, H. J. 1991. Status report for Descurainia torulosa (Wyoming tansymustard). Unpublished report prepared for the Bridger-Teton and Shoshone National Forests by the Wyoming Natural Diversity Database, Laramie, WY.

  • Marriott, H. J. 1992. Status report for Descurainia torulosa (Wyoming tansymustard), Sweetwater County, WY. Unpublished report prepared for the Bureau of Land Management, Rock Springs District by the Wyoming Natural Diversity Database, Laramie, WY.

  • Marriott, H.J. 1991. Status report for Descurainia torulosa (Wyoming tansy mustard). Unpublished report prepared for Bridger-Teton National Forest by the Wyoming Natural Diversity Database, Laramie.

  • Marriott, H.J. 1992. Status report for Descurainia torulosa (Wyoming tansy mustard), Sweetwater County, Wyoming. Unpublished report prepared for the Bureau of Land Management, Rock Springs District by the Wyoming Natural Diversity Database, Laramie.

  • Mills, S. and W. Fertig. 1996. Field guide to rare and Sensitive plants of the Shoshone National Forest. Report prepared by the Wyoming Natural Diversity Database, Laramie, WY.

  • Rollins, R. C. 1983. Studies in the Cruciferae of western North America. Journal of Arnold Arboretum 64:491-510.

  • Rollins, R. C. 1993. The Cruciferae of Continental North America: Systematics of the Mustard Family from the Arctic to Panama. Stanford University Press, Stanford, CA.

  • Rollins, R.C. 1983. Studies in the Cruciferae of western North America. J. Arnold Arboretum 64(4): 491-501.

  • Rollins, R.C. 1993a. The Cruciferae of continental North America: Systematics of the mustard family from the Arctic to Panama. Stanford Univ. Press, Stanford, California. 976 pp.

  • Rosenthal, D. M. 1998. Report on a general floristic survey of vascular plants in selected areas of Shoshone National Forest. Unpublished report prepared for the Shoshone National Forest by the Rocky Mountain Herbarium, University of Wyoming, Laramie, WY.

  • Rosenthal, D. M. 1999. A floristic survey of selected areas in Shoshone National Forest, Wyoming. Masters Thesis. Department of Botany, University of Wyoming, Laramie, WY.

  • Scott, R. W. 1997. The Alpine Flora of the Rocky Mountains; Volume 1. The Middle Rockies. University of Utah Press, Salt Lake City, UT.

  • Snow, N. 1994. The vascular flora of southeastern Yellowstone National Park and the headwaters region of the Yellowstone River, Wyoming. The Wasmann Journal of Biology 50:52-95.

  • U.S. Forest Service, Intermountain Region (USFS). 1990. Idaho and Wyoming endangered and sensitive plant field guide. U.S. Forest Service, Intermountain Region, Ogden, UT. 192 pp.

  • USDA Forest Service. 1989. Idaho and Wyoming: Endangered and Sensitive Plant Field Guide. USDA Forest Service Intermountain Region, Ogden UT.

  • USDA Forest Service. 1991. Threatened, Endangered, and Sensitive Species of the Intermountain Region. US Forest Service Region 4, Ogden, UT.

  • Ward, B. A. 1998. A floristic survey of south-central Wyoming. Masters Thesis. Department of Botany, University of Wyoming, Laramie, WY.

  • Welp, L., W.F. Fertig, G.P. Jones, G.P. Beauvais, and S.M. Ogle. 2000. Fine filter analysis of the Bighorn, Medicine Bow, and Shoshone National Forests in Wyoming. Wyoming Natural Diversity Database, Laramie, WY.

Use Guidelines & Citation

Use Guidelines and Citation

The Small Print: Trademark, Copyright, Citation Guidelines, Restrictions on Use, and Information Disclaimer.

Note: All species and ecological community data presented in NatureServe Explorer at http://explorer.natureserve.org were updated to be current with NatureServe's central databases as of November 2016.
Note: This report was printed on

Trademark Notice: "NatureServe", NatureServe Explorer, The NatureServe logo, and all other names of NatureServe programs referenced herein are trademarks of NatureServe. Any other product or company names mentioned herein are the trademarks of their respective owners.

Copyright Notice: Copyright © 2017 NatureServe, 4600 N. Fairfax Dr., 7th Floor, Arlington Virginia 22203, U.S.A. All Rights Reserved. Each document delivered from this server or web site may contain other proprietary notices and copyright information relating to that document. The following citation should be used in any published materials which reference the web site.

Citation for data on website including State Distribution, Watershed, and Reptile Range maps:
NatureServe. 2017. NatureServe Explorer: An online encyclopedia of life [web application]. Version 7.1. NatureServe, Arlington, Virginia. Available http://explorer.natureserve.org. (Accessed:

Citation for Bird Range Maps of North America:
Ridgely, R.S., T.F. Allnutt, T. Brooks, D.K. McNicol, D.W. Mehlman, B.E. Young, and J.R. Zook. 2003. Digital Distribution Maps of the Birds of the Western Hemisphere, version 1.0. NatureServe, Arlington, Virginia, USA.

Acknowledgement Statement for Bird Range Maps of North America:
"Data provided by NatureServe in collaboration with Robert Ridgely, James Zook, The Nature Conservancy - Migratory Bird Program, Conservation International - CABS, World Wildlife Fund - US, and Environment Canada - WILDSPACE."

Citation for Mammal Range Maps of North America:
Patterson, B.D., G. Ceballos, W. Sechrest, M.F. Tognelli, T. Brooks, L. Luna, P. Ortega, I. Salazar, and B.E. Young. 2003. Digital Distribution Maps of the Mammals of the Western Hemisphere, version 1.0. NatureServe, Arlington, Virginia, USA.

Acknowledgement Statement for Mammal Range Maps of North America:
"Data provided by NatureServe in collaboration with Bruce Patterson, Wes Sechrest, Marcelo Tognelli, Gerardo Ceballos, The Nature Conservancy-Migratory Bird Program, Conservation International-CABS, World Wildlife Fund-US, and Environment Canada-WILDSPACE."

Citation for Amphibian Range Maps of the Western Hemisphere:
IUCN, Conservation International, and NatureServe. 2004. Global Amphibian Assessment. IUCN, Conservation International, and NatureServe, Washington, DC and Arlington, Virginia, USA.

Acknowledgement Statement for Amphibian Range Maps of the Western Hemisphere:
"Data developed as part of the Global Amphibian Assessment and provided by IUCN-World Conservation Union, Conservation International and NatureServe."

NOTE: Full metadata for the Bird Range Maps of North America is available at:
http://www.natureserve.org/library/birdDistributionmapsmetadatav1.pdf.

Full metadata for the Mammal Range Maps of North America is available at:
http://www.natureserve.org/library/mammalsDistributionmetadatav1.pdf.

Restrictions on Use: Permission to use, copy and distribute documents delivered from this server is hereby granted under the following conditions:
  1. The above copyright notice must appear in all copies;
  2. Any use of the documents available from this server must be for informational purposes only and in no instance for commercial purposes;
  3. Some data may be downloaded to files and altered in format for analytical purposes, however the data should still be referenced using the citation above;
  4. No graphics available from this server can be used, copied or distributed separate from the accompanying text. Any rights not expressly granted herein are reserved by NatureServe. Nothing contained herein shall be construed as conferring by implication, estoppel, or otherwise any license or right under any trademark of NatureServe. No trademark owned by NatureServe may be used in advertising or promotion pertaining to the distribution of documents delivered from this server without specific advance permission from NatureServe. Except as expressly provided above, nothing contained herein shall be construed as conferring any license or right under any NatureServe copyright.
Information Warranty Disclaimer: All documents and related graphics provided by this server and any other documents which are referenced by or linked to this server are provided "as is" without warranty as to the currentness, completeness, or accuracy of any specific data. NatureServe hereby disclaims all warranties and conditions with regard to any documents provided by this server or any other documents which are referenced by or linked to this server, including but not limited to all implied warranties and conditions of merchantibility, fitness for a particular purpose, and non-infringement. NatureServe makes no representations about the suitability of the information delivered from this server or any other documents that are referenced to or linked to this server. In no event shall NatureServe be liable for any special, indirect, incidental, consequential damages, or for damages of any kind arising out of or in connection with the use or performance of information contained in any documents provided by this server or in any other documents which are referenced by or linked to this server, under any theory of liability used. NatureServe may update or make changes to the documents provided by this server at any time without notice; however, NatureServe makes no commitment to update the information contained herein. Since the data in the central databases are continually being updated, it is advisable to refresh data retrieved at least once a year after its receipt. The data provided is for planning, assessment, and informational purposes. Site specific projects or activities should be reviewed for potential environmental impacts with appropriate regulatory agencies. If ground-disturbing activities are proposed on a site, the appropriate state natural heritage program(s) or conservation data center can be contacted for a site-specific review of the project area (see Visit Local Programs).

Feedback Request: NatureServe encourages users to let us know of any errors or significant omissions that you find in the data through (see Contact Us). Your comments will be very valuable in improving the overall quality of our databases for the benefit of all users.