Thick-leaf Bladderpod - Physaria pachyphylla
State Rank Reason (see State Rank above)
See rank details.
- Details on Status Ranking and Review
Score2 - Small: Generally 2,000-10,000 individuals.
CommentEstimated as precise population data are lacking.
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.
ScoreNA - Rank factor not assessed.
Score0-1 - Low to Medium.
Score0-1 - Low to Moderate Vulnerability.
Raw Conservation Status Score
8 to 11 total points scored out of a possible 16 (Rarity factors and threats only).
Stems ascending, 2–15 cm from a simple caudex clothed in old leaf bases. Basal leaves spatulate to oblanceolate, 15–50 mm long, entire. Stem leaves spatulate. Vestiture of dense, 5-rayed, stellate hairs. Petals 6–8 mm long. Fruit narrowly elliptic to ovoid, inflated, 3–6 mm high; style 2.5–4 mm long; seeds 4 per locule; pedicels ascending, curved, 3–10 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
Endemic to Carbon County, MT and probably adjacent WY (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
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)
Stony soil derived from limestone or calcareous sandstone on exposed slopes, ridges; valleys (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
Ecological Systems Associated with this Species
- Additional ReferencesLegend: View Online Publication
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- Grady, B. R., and S. L. O'Kane. 2007. New Species and Combinations in Physaria (Brassicaceae) from Western North America. Novon 17 (2): 182-192.
- Grady, Benjamin R. 2005. Molecules, morphology, and biogeography: an analysis of the phylogeny and taxonomy of the Physaria reediana species complex (Brassicaceae).
- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.