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Montana Field Guides

Curved Bladderpod - Physaria curvipes
Other Names:  Lesquerella alpina [in part and misapplied]

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Status Under Review
Native Species

Global Rank: G3G4
State Rank: S3?
(see State Rank Reason below)
C-value:


Agency Status
USFWS:
USFS:
BLM:


 

External Links

State Rank Reason (see State Rank above)
See rank details.
  • Details on Status Ranking and Review
    Curved Bladderpod (Physaria curvipes) Conservation Status Review
    Review Date = 11/05/2012
    View State Conservation Rank Criteria
    Population Size

    Score1-2 - Small to Moderate. Population size is imprecisely known but is believed to be >2,000 individuals and <100,000 individuals.

    Range Extent

    Score2 - Regional or State Endemic or Small Montana Range: Generally restricted to an area <100,000 sq. miles (equivalent to 2/3 the size of Montana or less) or Montana contributes 50% or more of the species’ range or populations OR limited to 2-3 Sub-basins in Montana.

    Area of Occupancy

    Score2 - Low: Generally occurring in 4-10 Subwatersheds (6th Code HUC’s).

    Environmental Specificity

    Score1 - Moderate: Species is restricted to a specific habitat that is more widely distributed or to several restricted habitats and is typically dependent upon relatively unaltered, good-quality habitat (C Values of 5-7).

    Trends

    Score0-1 - Stable to Minor Declines:

    Threats

    Score0-1 - Low to Medium.

    Intrinsic Vulnerability

    Score0-1 - Low to Moderate Vulnerability.

    Raw Conservation Status Score

    Score 6 to 10 total points scored out of a possible 19.

 
General Description
Stems ascending, 8–24 cm from a simple caudex. Basal leaves spatulate, 25–50 mm long, the blade elliptic to rhombic, entire. Stem leaves spatulate. Vestiture of dense, appressed, 4- to 5-rayed stellate hairs. Petals 4–6 mm long. Fruit ovoid, inflated, 5–9 mm high; style 1.5–2.5 mm long; seeds 2 to 4 per locule; pedicels sigmoid-spreading, 4–7 mm long (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Diagnostic Characteristics
Curved Bladderpod - Physaria curvipes
*Pedicels are sigmoid to speading, 4-7 mm long.
*Fruits inflated (not obviously 2-lobed), ovoid, and 5-9 mm tall. Style is less than half the length of the fruit (silicle).
*Basal leaf blades are thinner than 1 mm.

Thick-leaf Bladderpod – Physaria pachyphylla, SOC
*Inflorescence is a subumbellate raceme.
*Fruiting pedicels curve upwards (ascend), are 3-10 mm long, and less than 2 times longer than fruit.
*Fruits inflated, narrowly elliptic to globose (not obviously appearing 2-lobed), and 3-6 mm tall. Style is 1-3 mm long, shorter than the mature fruit (silicle).
*Basal leaves have distinct petioles and blades. Basal blades are oblanceolate to orbicular in shape, nearly 1 mm thick, and cupped (not folded).
*Plants grow on white to pinkish, limestone and gypsum soils on exposed ridges and slopes in the valley zone.

Species Range
Montana Range Range Descriptions

Native
 


Range Comments
Endemic to Big Horn County, MT and adjacent WY (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 19

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
Stony, calcareous soil of exposed slopes, ridges in grassland, open forest; montane to subalpine (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Ecological Systems Associated with this Species


References
  • Literature Cited AboveLegend:   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 ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • 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. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.
    • Rennick, R.B. 1981. Effects of prescribed burning on mixed prairie vegetation in southeastern Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 144 p.
    • South, P.R. 1957. Food habits and range use of the mule deer in the Scudder Creek area, Beaverhead County, Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 34 p.
    • Tschache, O.P. 1970. Effects of ecological changes induced by various sagebrush control techniques on small mammal populations. M.Sc. Thesis. Bozeman, MT: Montana State University. 51 p.
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Citation for data on this website:
Curved Bladderpod — Physaria curvipes.  Montana Field Guide.  .  Retrieved on , from