Draba crassa - Rydb.
Thick-leaf Whitlow-grass
Taxonomic Status: Accepted
Related ITIS Name(s): Draba crassa Rydb. (TSN 22871)
Unique Identifier: ELEMENT_GLOBAL.2.144645
Element Code: PDBRA110S0
Informal Taxonomy: Plants, Vascular - Flowering Plants - Mustard Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Capparales Brassicaceae Draba
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Concept Reference
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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: Draba crassa
Conservation Status
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NatureServe Status

Global Status: G3G4
Global Status Last Reviewed: 28Oct2009
Global Status Last Changed: 28Oct2009
Rounded Global Status: G3 - Vulnerable
Reasons: Regional endemic of Montana, Wyoming, Colorado, and Utah known from 80 plus occurrences.
Nation: United States
National Status: N3

U.S. & Canada State/Province Status
United States Colorado (S3), Montana (S2S3), Utah (S1), Wyoming (S3)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: Regional endemic of south central Montana, western Wyoming, northeastern Utah, and central Colorado.

Number of Occurrences: 21 - 80
Number of Occurrences Comments: Known from approximately 60 extant occurrences in Colorado and Utah; another 20 plus are expected in Montana and Utah.

Population Size Comments: Range wide population size is unknown, a minimum of approximately 2700 individuals have been reported from Colorado, however, all occurrences do not report abundance information.

Number of Occurrences with Good Viability/Integrity: Some (13-40)
Viability/Integrity Comments: There are 15 A or B ranked occurrences in Colorado.

Overall Threat Impact: Medium
Overall Threat Impact Comments: Recreational use of the habitat, such as foot traffic from hikers poses a threat to some occurrences,
particularly those within popular hiking areas. May be threatened by trail construction, trampling, and mining.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Regional endemic of south central Montana, western Wyoming, northeastern Utah, and central Colorado.

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

U.S. & Canada State/Province Distribution
United States CO, MT, UT, WY

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
CO Chaffee (08015), Clear Creek (08019), Eagle (08037), Grand (08049), Gunnison (08051)*, Hinsdale (08053)*, Huerfano (08055), Lake (08065), Ouray (08091), Park (08093), Pitkin (08097), Pueblo (08101), Saguache (08109), San Juan (08111), San Miguel (08113), Summit (08117)
MT Beaverhead (30001), Deer Lodge (30023), Granite (30039), Madison (30057), Park (30067)
WY Fremont (56013), Park (56029), Sublette (56035), Teton (56039)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
10 Big Hole (10020004)+, Madison (10020007)+, Gallatin (10020008)+, Yellowstone Headwaters (10070001)+, Upper Yellowstone (10070002)+, Clarks Fork Yellowstone (10070006)+, Upper Wind (10080001)+, Little Wind (10080002)+, Popo Agie (10080003)+, North Fork Shoshone (10080012)+, South Platte Headwaters (10190001)+, Upper South Platte (10190002)+, Clear (10190004)+, St. Vrain (10190005)+
11 Arkansas Headwaters (11020001)+, Upper Arkansas (11020002)+, Huerfano (11020006)+
13 San Luis (13010003)+
14 Colorado headwaters (14010001)+, Blue (14010002)+, Eagle (14010003)+, Roaring Fork (14010004)+, East-Taylor (14020001)+*, Upper Gunnison (14020002)+*, Uncompahange (14020006)+, San Miguel (14030003)+, Upper Green (14040101)+, New Fork (14040102)+, Upper San Juan (14080101)+, Animas (14080104)+
17 Flint-Rock (17010202)+, Snake headwaters (17040101)+, Gros Ventre (17040102)+, Greys-Hobock (17040103)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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General Description: Draba crassa is a yellow-flowered mustard, with the typical four petals and sepals. It forms a thick-rooted rosette. Its oblanceolate to obovate leaves are shiny and nearly succulent, with glabrous surfaces and ciliate margins. There is an average of four leaves on each stem.

Habitat Comments: Alpine tundra, typically in talus or rock stripes (ridges), 10,000 to 12,000 feet.
Economic Attributes Not yet assessed
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Management Summary Not yet assessed
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Population/Occurrence Delineation Not yet assessed
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Population/Occurrence Viability
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U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
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Authors/Contributors
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NatureServe Conservation Status Factors Edition Date: 28Oct2009
NatureServe Conservation Status Factors Author: Neighbors, M.L.; rev. Handwerk, J. and A.Tomaino (2009)
Element Ecology & Life History Edition Date: 16Apr2009
Element Ecology & Life History Author(s): Lyon, P.

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
  • 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.

  • Dorn, R. D. 1992. Vascular Plants of Wyoming, second edition. Mountain West Publishing, Cheyenne, WY.

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

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

  • Fertig, W. 1999. State Species Abstract: Draba crassa. Wyoming Natural Diversity Database. Available on the internet at www.uwyo.edu/wyndd.

  • Fertig, W. 1992. A floristic survey of the west slope of the Wind River Range, Wyoming. Masters Thesis. Department of Botany, University of Wyoming, Laramie, WY.

  • 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. 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., R. L. Hartman, and B. E. Nelson. 1991. General floristic survey of the west slope of the Wind River Range, Bridger-Teton National Forest, 1990. Unpublished report prepared for the Bridger-Teton National Forest by the Rocky Mountain Herbarium, University of Wyoming, Laramie, WY.

  • Hitchcock, C. L. 1941. A revision of the Drabas of western North America. University of Washington Publications in Biology 11:1-132.

  • Hitchcock, C. L. and A. Cronquist. 1964. Vascular Plants of the Pacific Northwest, Part 2: Salicaceae to Saxifragaceae. Pages 1-914. University of Washington Press, Seattle, WA.

  • Jones, G. P. and W. Fertig. 1999. Ecological evaluation of the potential Sheep Mesa Research Natural Area within the Shoshone National Forest, Park County, Wyoming. Unpublished report prepared for the Shoshone National Forest, USDA Forest Service by the Wyoming Natural Diversity Database, Laramie, WY.

  • 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.

  • Kartesz, J.T. 1999. A synonymized checklist and atlas with biological attributes for the vascular flora of the United States, Canada, and Greenland. First edition. In: Kartesz, J.T., and C.A. Meacham. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden, Chapel Hill, N.C.

  • Kesonie, D. T. 2009. A floristic inventory of Grand Teton National Park and the Pinyon Peak Highlands, Wyoming. Masters Thesis. Department of Botany, University of Wyoming, Laramie, WY.

  • Kesonie, D. T. and R. L. Hartman. 2011. A floristic inventory of Grand Teton National Park, Pinyon Peak Highlands, and Vicinity, Wyoming, U.S.A. Journal of the Botanical Research Institute of Texas 5:357-388.

  • Massatti, R. T. 2007. A floristic inventory of the East Slope of the Wind River Mountain Range and vicinity, Wyoming. Masters Thesis. Department of Botany, University of Wyoming, Laramie, WY.

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

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

  • Spackman, S., M. Duff, and S. Floyd. 1996. Fourteeners initiative rare plant survey report. Rare plant surveys of Mount Missouri, Mount Huron, Mount Harvard, Mount Shavano, Mount Massive and Tabequache Peak in the southern Sawatch Range, Colorado 1994 and 1995. Unpublished report prepared for the U.S. Forest Service, Leadville Ranger District by the Colorado Natural Heritage Program, Fort Collins, CO.

  • Weber, W.A. 1987. Colorado Flora: Western Slope. Colorado Associated University Press, Boulder, Colorado. 530pp

  • Welsh, S.L., N.D. Atwood, L.C. Higgins and S. Goodrich. 1987. Utah Flora, Great Basin Naturalist Memoirs, No. 9. Brigham Young University, Provo, Utah.

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