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Clasping Pepper-grass - Lepidium perfoliatum
Other Names:
Clasping Pepperweed
General Description
Taprooted annual. Stems erect, 10–45 cm, simple. Basal leaves petiolate, oblanceolate, 1–12 cm long, 2–3-times divided into linear segments. Stem leaves 3–30 mm long, broadly ovate, cordate to perfoliate with entire margins, becoming sessile. Vestiture: basal leaves with long, simple hair or glabrous; glabrous above. Flowers yellow; petals 1–1.5 mm long; stamens 6. Fruit ovate, glabrous, 3–4.5 mm long, shallowly notched; style 0.2–0.4; pedicels ascending, glabrous, 3–5 mm long (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Species Range
Montana Range
Range Descriptions
Non-native
Range Comments
Introduced throughout much of temperate North America; native to Eurasia (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Observations in Montana Natural Heritage Program Database
Number of Observations: 386
(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
Sparsely vegetated, vernally moist soil of grasslands, steppe, roadsides and around saline or alkaline wetlands; plains, valleys (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Management
Stewardship Responsibility
Based on the Montana Natural Heritage Program's latest
predicted habitat suitability model
| Total species' range in Montana |
381,296 km2 |
(100% of Montana) |
Area predicted to have
some level of suitable habitat |
168,408 km2 |
(44% of Montana) |
Stewardship responsibility for the predicted area of suitable habitat can be broken down as follows
| |
Total Suitable |
Optimal Suitability |
Moderate Suitability |
Low Suitability |
| Federal |
18% |
<1% |
10% |
8% |
| State |
6% |
<1% |
2% |
4% |
| Local |
<1% |
<1% |
<1% |
<1% |
| Conservation Lands/Easements |
3% |
<1% |
1% |
2% |
| Private/Tribal/Unknown |
73% |
1% |
23% |
49% |
See the Habitat Suitability for Biodiversity task in Map Viewer
for a more detailed look at stewardship responsibilities within a variety of local jurisdictions.
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?
Anderson, N.L. 1962. Grasshopper-vegetation relationships on Montana grasslands. Ph.D Dissertation. Bozeman, Montana: Montana State University. 73 p.- Cope, M.G. 1992. Distribution, habitat selection and survival of transplanted Columbian Sharp-tailed Grouse (Tympanuchus phasianellus columbianus) in the Tobacco Valley, Montana. M.Sc. Thesis. Bozeman, Montana: Montana State University. 60 p.
- Culver, D.R. 1994. Floristic analysis of the Centennial Region, Montana. M.Sc. Thesis. Montana State University, Bozeman. 199 pp.
- Eggers, M.J.S. 2005. Riparian vegetation of the Montana Yellowstone and cattle grazing impacts thereon. M.Sc. Thesis. Montana State University, Bozeman, MT. 125 p.
- Harvey, S.J. 1990. Responses of steppe plants to gradients of water soil texture and disturbance in Montana, U.S.A. Ph.D. Thesis. Bozeman, MT: Montana State University. 34 p.
- 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.
- Meier, G.A. 1997. The colonization of Montana roadsides by native and exotic plants. M.Sc. Thesis. Bozeman, MT: Montana State University. 45 p.
- Quire, R.L. 2013. The sagebrush steppe of Montana and southeastern Idaho shows evidence of high native plant diversity, stability, and resistance to the detrimental effects of nonnative plant species. M.Sc. Thesis. Bozeman, MT: Montana State University. 124 p.
- Sater, S. 2022. The insects of Sevenmile Creek, a pictorial guide to their diversity and ecology. Undergraduate Thesis. Helena, MT: Carroll College. 242 p.
- Seipel, T.F. 2006. Plant species diversity in the sagebrush steppe of Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 87 p.
- Thompson, W. L. 1993. Ecology of Merriam's Turkeys in relation to burned and logged areas in southeastern Montana. Ph.D. Dissertation. Bozeman, MT: Montana State University. 195 p.
- Trout, R.G. 1978. Small mammal abundance and distribution in the Missouri River Breaks, Montana. M.Sc. Thesis. Bozeman, Montana: Montana State University. 64 p.
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