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Bitterroot Draba -
Draba apiculata var. daviesiae
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State Rank Reason (see State Rank above)
A Montana endemic, known from several occurrences in alpine areas of the Bitterroot Mountains. Overall abundance and distribution are still poorly known though the high elevation habitat would likely limit most potential impacts.
Details on Status Ranking and Review
Score 2 - Small: Generally 2,000-10,000 individuals. Range Extent
Score 3 - Local Endemic or Very Small Montana Range: Generally restricted to an area <10,000 sq. miles (equivalent to the combined area of Phillips and Valley Counties) or <6 Sub-basins (4th code watersheds) Range-wide OR limited to one Sub-basin in Montana Area of Occupancy
Score 2 - Low: Generally occurring in 4-10 Subwatersheds (6th Code HUC’s). Environmental Specificity
Score 1-2 - Moderate to High. Trends
Score 0-1 - Stable to Minor Declines:
CommentTrends unknown, though populations are likely stable or experiencing only minor declines. Threats
Score 0 - Low: Impacts, if any, to the species are expected to be minor or insignificant (affecting <10% of populations) in severity, scope and immediacy.
CommentHabitat is remote.
Score 1 - Moderate Vulnerability: Specific biological attributes, unusual life history characteristics or limited reproductive potential makes the species susceptible to extirpation from stochastic events or other adverse impacts to its habitat and slow to recover. Raw Conservation Status Score
9 to 11 total points scored out of a possible 19.
Mat-forming perennial; the caudex clothed in old leaf bases. Stems simple, 1–5 cm. Basal leaves oblong, 2–5 mm long, entire. Stem leaves lacking. Vestiture of simple leaf cilia; otherwise glabrous. Petals yellow, 3–5 mm long. Fruit ascending, 4–6 mm long, 2–3 mm wide, glabrous; style 0.3–0.5 mm long; lower pedicels 3–6 mm long (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX
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Flowering in July and August, mature fruit in late July and August.
Montana endemic, restricted to Bitterroot Mountains in Ravalli County.
Observations in Montana Natural Heritage Program Database
Number of Observations:
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Map Help and Descriptions
(Observations spanning multiple months or years are excluded from time charts)
Rocky slopes and talus near or above timberline.
Ecological Systems Associated with this Species
Commonly Associated with these Ecological Systems
Threats or Limiting Factors
STATE THREAT SCORE REASON Threat impact not assigned because threats are not known (MTNHP Threat Assessment 2021).
Literature Cited Above
Legend: View Online Publication Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p. Additional References
Legend: View Online Publication Do you know of a citation we're missing? Lackschewitz, K. 1986. Plants of west-central Montana, identification and ecology: annotated checklist. General Technical Report INT-217. U.S.D.A. Forest Service, Intermountain Research Station, Ogden, Utah. 128 pp. Lackschewitz, K. 1991. Vascular plants of west-central Montana--identification guidebook. U.S. Forest Service Intermountain Research Station, Ogden, UT. 648 pp. Rollins, R. C. 1984. Studies in the Cruciferae of western North America II. Contributions Gray Herbarium 214:1-18. Rollins, R. C. 1993. The Cruciferae of Continental North America: systematics of the mustard family from the Arctic to Panama. Stanford University Press, Stanford, California. 976 pp. Web Search Engines for Articles on "Bitterroot Draba"