Braya humilis - (C.A. Mey.) B.L. Robins.
Low Braya
Other English Common Names: Low Northern Rockcress
Synonym(s): Braya novae-angliae (Rydb.) Sorensen
Taxonomic Status: Accepted
Related ITIS Name(s): Braya humilis (C.A. Mey.) B.L. Robins. (TSN 22749)
French Common Names: braya délicat
Unique Identifier: ELEMENT_GLOBAL.2.160338
Element Code: PDBRA0D040
Informal Taxonomy: Plants, Vascular - Flowering Plants - Mustard Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Capparales Brassicaceae Braya
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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: Braya humilis
Taxonomic Comments: While numerous subspecies or varieties are recognized in Braya humilis by some researchers, Kartesz (1994 checklist and Jan98 review draft dataset) instead treats the species broadly without recognition of any infraspecific taxa.
Conservation Status
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NatureServe Status

Global Status: G5
Global Status Last Reviewed: 09Mar2016
Global Status Last Changed: 17May1999
Ranking Methodology Used: Ranked by inspection
Rounded Global Status: G5 - Secure
Nation: United States
National Status: NNR
Nation: Canada
National Status: N5 (15Jun2015)

U.S. & Canada State/Province Status
United States Alaska (SNR), Colorado (S2), Michigan (S1), Montana (S1), Vermont (S1), Virginia (SNA), Wyoming (S1)
Canada Alberta (S1), British Columbia (SNR), Manitoba (S2), Newfoundland Island (S1), Northwest Territories (SNR), Nunavut (SU), Ontario (S5), Quebec (S2), Yukon Territory (S4)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: Alaska to Greenland south to British Columbia, Alberta, and Vermont, with disjunct populations in northwest Wyoming and central Colorado.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Alaska to Greenland south to British Columbia, Alberta, and Vermont, with disjunct populations in northwest Wyoming and central Colorado.

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

U.S. & Canada State/Province Distribution
United States AK, CO, MI, MT, VAexotic, VT, WY
Canada AB, BC, MB, NF, NT, NU, ON, QC, YT

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
CO Chaffee (08015), Gunnison (08051)*, Lake (08065), Park (08093), Summit (08117)
MI Keweenaw (26083)*
MT Beaverhead (30001)
VT Orleans (50019)
WY Fremont (56013)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
01 Passumpsic (01080102)+*
04 Keweenaw Peninsula (04020103)+*, St. Francois River (04150500)+
10 Red Rock (10020001)+, Big Hole (10020004)+, Upper Wind (10080001)+, South Platte Headwaters (10190001)+
11 Arkansas Headwaters (11020001)+
14 Blue (14010002)+, East-Taylor (14020001)+*, Tomichi (14020003)+*
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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General Description: Low Braya is a short-lived perennial with 1 to several erect to prostrate stems, 3-20 cm long, which arise from a simple or branched rootcrown and taproot. The numerous basal leaves are lance-shaped and 1-3 cm long with entire or toothed margins. The widely spaced stem leaves are alternate and smaller. Foliage is sparsely to densely covered with simple and branched hairs. Flowers are borne on short stalks in terminal clusters that expand as the fruit matures. Each flower has 4 white petals, which are 3-4 mm long, 4 sepals, 4 long stamens, and 2 short stamens. The erect or spreading linear fruits are 1-3 cm long.
Diagnostic Characteristics: Braya humilis is most likely confused with species of Arabis; however, the fruits of B. humilis are round in cross-section and constricted between the seeds, while those of Arabis usually are not.
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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Element Ecology & Life History Edition Date: 21Nov1994
Element Ecology & Life History Author(s): JM

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
  • Abbe, E.C. 1948. BRAYA in boreal eastern America. Rhodora 50: 1-15.

  • 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.

  • Bouchard, A., D. Barabé, M. Dumais et S. Hay 1983. Les plantes vasculaires rares du Québec. Syllogeus no 48. Musées nationaux du Canada. Ottawa. 75 p.

  • Bouchard, A., D. Barabé, Y. Bergeron, M. Dumais et S. Hay. 1985. La phytogéographie des plantes vasculaires rares du Québec. Le Naturaliste canadien 112 : 283-300.

  • Carron, J. No date. Population and extinction probability modeling of Braya humilis. The Nature Conservancy, Colorado Field Office. 9 pp.


  • Colorado Native Plant Society. 1997. Rare Plants of Colorado, second edition. Falcon Press Publ., Helena, MT.

  • 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. 2000. State Species Abstract: Braya humilis. Wyoming Natural Diversity Database. Available on the internet at www.uwyo.edu/wyndd.

  • Fertig, W. 1996. Additions and deletions to the flora of Wyoming. Castilleja 15:6-7.

  • Fertig, W. 1996. Wyoming plant species of special concern: 1996 edition. Report prepared by the Wyoming Natural Diversity Database, 32pp.

  • 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.

  • Fleurbec / G. Lamoureux, S. Lamoureux, A. Tousignant, L. Cournoyer et R.F. Gauthier / 1994. Plantes susceptibles d'être désignées menacées ou vulnérables. Noms français de 229 espèces. Rapport non publié, préparé pour le gouvernement du Québec, ministère

  • Flora of North America Editorial Committee. 2010. Flora of North America North of Mexico. Vol. 7. Magnoliophyta: Salicaceae to Brassicaceae. Oxford University Press, New York. xxii + 797 pp.

  • Jones, G. P. and W. Fertig. 1999. Ecological evaluation of the potential Arrow Mountain Research Natural Area within the Shoshone National Forest, Fremont 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.

  • Lesica, P. and P. F. Stickney. 1994. Noteworthy collections: Montana. Madrono 41:228-231.

  • 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.

  • Meades, S.J. & Hay, S.G; Brouillet, L. 2000. Annotated Checklist of Vascular Plants of Newfoundland and Labrador. Memorial University Botanical Gardens, St John's NF. 237pp.

  • NatureServe. Unpublished. Concept reference for taxa for which no reference which describes the circumscription has been recorded; to be used as a placeholder until such a citation is identified.

  • Neely, E. E. and A. T. Carpenter. 1986. Size, structure, and habitat characteristics of populations of Braya humilis var. humilis (Brassicaceae): an alpine disjunct from Colorado. Western North American Naturalist 46:728-735.

  • O'Kane, S. L. 1988. Colorado's Rare Flora. Great Basin Naturalist. 48(4):434-484.

  • O'Kane, S.L. 1988. Colorado's rare flora. Great Basin Naturalist 48 (4):434-484.

  • 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.

  • Spackman, S., B. Jennings, J. Coles, C. Dawson, M. Minton, A. Kratz, and C. Spurrier. 1997. Colorado Rare Plant Field Guide. Prepared for the Bureau of Land Management, the U.S. Forest Service and the U.S. Fish & Wildlife Service by the Colorado Natural Heritage Program, Fort Collins, CO.

  • Spackman, S., B. Jennings, J. Coles, C. Dawson, M. Minton, A. Kratz, and C. Spurrier. 1997. Colorado rare plant field guide. Prepared for Bureau of Land Management, U.S. Forest Service and U.S. Fish and Wildlife Service by Colorado Natural Heritage Program.

  • USDA, NRCS. 2013. The PLANTS Database. National Plant Data Team, Greensboro, NC 27401-4901 USA.

  • Weber, W. A. and R. C. Wittmann. 2012. Colorado Flora, Eastern Slope, A Field Guide to the Vascular Plants, Fourth Edition. Boulder, Colorado. 555 pp.

  • Weber, W. A. and R. C. Wittmann. 2012. Colorado Flora, Western Slope, A Field Guide to the Vascular Plants, Fourth Edition. Boulder, Colorado. 532 pp.

  • 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.

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