Beautiful Bladderpod - Physaria pulchella
Lesquerella pulchella, Physaria carinata ssp. pulchella
State Rank Reason (see State Rank above)
Beautiful bladderpod is a state endemic - occurring only in Montana - and is known only from a few locations, where it is restricted to small areas of sparsely vegetated habitat.
- Details on Status Ranking and Review
Score1 - Moderate: Generally 10,000-100,000 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
Score1 - Moderate: Generally occurring in 11-25 Subwatersheds (6th Code HUC’s).
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).
ScoreNA - Rank factor not assessed.
Score0-1 - Low to Medium.
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
7 to 8 total points scored out of a possible 16 (Rarity factors and threats only).
Beautiful Bladderpod is an herbaceous perennial with unbranched, prostrate to ascending stems arising from a branched rootcrown and taproot. The basal leaves have short petioles and elliptic, entire-margined blades. The alternate stem leaves are smaller and lack petioles. The foliage is covered with branched hairs. Yellow, stalked flowers are borne at the tops of the stems in a narrow inflorescence that elongates as the fruit matures. Each flower has 4 separate petals, 4 separate sepals, and 4 long and 2 short stamens. The flattened capsules (siliques) are round to broadly elliptic with a keel on each face.
Flowering occurs in June at lower elevations, and from mid-July through early August at higher elevations.
This species can be distinguished by the flattened, nearly circular fruits with a low ridge on each face, continuous with the style. Fruits of the similar L. carinata and L. paysonii are longer than broad.
It is a state endemic restricted to Beaverhead County in the Pioneer Mtns., the Grasshopper Creek drainage, and the Centennial Mtns. (Rollins 1995).
Observations in Montana Natural Heritage Program Database
Number of Observations:
(Click on the following maps and charts to see full sized version)
Map Help and Descriptions
(Observations spanning multiple months or years are excluded from time charts)
In Montana, this species has been found on gravelly, calcareous soils of sparsely vegetated foothill slopes at elevations ranging from 6200 to 7600 feet. It also occurs in poorly developed, stony soils of subalpine slopes and ridges in the Pioneer and Centennial mountain ranges at 8600-9200 feet. At lower elevations it inhabits openings in mountain mahogany or limber pine woodlands. It also is found in sparse grassland or cushion plant communities at all elevations. This plant is usually associated with calcareous parent material, although it is found on both limestone and associated quartzite in the Centennial Mountains.
Ecological Systems Associated with this Species
This species is a short-lived perennial calciphile that occupies severe, sparsely vegetated habitats with low competition. It can also enter recently disturbed areas, as in Beaverhead County where small numbers of plants had colonized an open stream bed and an abandoned two-track. The species' natural habitat is subject to frost heave, and rodent burrowing has also been noted (Heidel and Vanderhorst 1996).
Beautiful bladderpod occurs in areas with a history of human and natural disturbances. It appears to tolerate and may benefit from disturbances that reduce competition. Invasive weeds may become a threat; the closely related Lesquerella carinata var. languida is being threatened by spotted knapweed (Vanderhorst 1995). Several known populations occur in areas of historic mining activity.
- Additional ReferencesLegend: View Online Publication
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- Al-Shehbaz, I. A. and S. L. O'Kane. 2002. Lesquerella is united with Physaria (Brassicaceae). Novon 12:319-329.
- Heidel, B.L. 1993. Status review of Lesquerella sp. novum, Butte District Bureau of Land Management, Montana. Unpublished report to the Bureau of Land Management. Montana Natural Heritage Program, Helena, Montana. 40 pp.
- Heidel, B.L. and J. Vanderhorst. 1996. Sensitive plant species surveys in the Butte District, Beaverhead and Madison Counties. Unpublished report to the Bureau of Land Management. Montana Natural Heritage Program, Helena, Montana.
- 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. 1995. Two Lesquerellas (Cruciferae) of south central and western Montana. Novon 5(1): 71-75.
- Vanderhorst, J.P. 1995. Report on the conservation status of Lesquerella carinata var. languida, a candidate threatened species. Unpublished report to the Bureau of Land Management and the U.S. Fish and Wildlife Service. Montana Natural Heritage Program, Helena, Montana 56 pp.
- Vanderhorst, J.P. 1995. Survey of Bannack State Park and vicinity for Montana plant species of special concern. Unpublished report to Bannack State Park, Montana Department of Fish, Wildlife, and Parks. Montana Natural Heritage Program, Helena, MT. 43 pp.