Bitterroot Draba - Draba daviesiae
Draba apiculata var. daviesiae
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
Score2 - Small: Generally 2,000-10,000 individuals.
Score3 - 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
Score2 - Low: Generally occurring in 4-10 Subwatersheds (6th Code HUC’s).
Score1-2 - Moderate to High.
Score0-1 - Stable to Minor Declines:
CommentTrends unknown, though populations are likely stable or experiencing only minor declines.
Score0 - 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.
Score1 - 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 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.
Bitterroot Mountains, Ravalli County, Montana.
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
- Additional ReferencesLegend: View Online Publication
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- 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.
- Lesica, P., M. T. Lavin, and P. F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
- 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.