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Montana Field Guide

Montana Field Guides

Roundleaf Thermopsis - Thermopsis rhombifolia

Native Species

Global Rank: G5
State Rank: S4

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 4

External Links






 
General Description
Stems ascending to erect, often single, 15–40 cm. Herbage glabrate to strigose. Leaflets ovate, 15–50 mm long; stipules shorter, wider. Racemes moderately dense, 3–10 cm long, longer than the leaves. Flowers 15–25 mm long; calyx glabrous to sparsely strigose; sepals 2–4 mm long. Legume ascending to spreading, pubescent, curved, 3–8 cm long with 3 to 10 seeds (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Montana Range

Year-round
 


Range Comments
AB to ND south to CO (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 551

(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
Grasslands, sagebrush steppe, badlands, river banks; plains, valleys (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Ecology
POLLINATORS
The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap: Bombus appositus, Bombus auricomus, Bombus bifarius, Bombus centralis, Bombus fervidus, Bombus flavifrons, Bombus huntii, Bombus nevadensis, Bombus rufocinctus, Bombus occidentalis, and Bombus griseocollis (Macior 1974, Thorp et al. 1983).

References
  • Literature Cited AboveLegend:   View Online Publication
    • Macior, L.M. 1974. Pollination ecology of the Front Range of the Colorado Rocky Mountains. Melanderia 15: 1-59.
    • Thorp, R.W., D.S. Horning, and L.L. Dunning. 1983. Bumble bees and cuckoo bumble bees of California (Hymenoptera: Apidae). Bulletin of the California Insect Survey 23:1-79.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Gobeille, J.E. 1992. The effect of fire on Merriams turkey brood habitat in southeastern Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 61 p.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Mundinger, J.G. 1975. The influence of rest-rotation grazing management on waterfowl production on stock-water reservoirs in Phillips County, Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 100 p.
    • Nielsen, L.S. 1978. The effects of rest-rotation grazing on the distribution of Sharp-tailed Grouse. M.Sc. Thesis. Bozeman, MT: Montana State University. 52 p.
    • Rundquist, V.M. 1973. Avian ecology on stock ponds in two vegetational types in north-central Montana. Ph.D. Dissertation. Bozeman, MT: Montana State University. 112 p.
    • Seipel, T.F. 2006. Plant species diversity in the sagebrush steppe of Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 87 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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Citation for data on this website:
Roundleaf Thermopsis — Thermopsis rhombifolia.  Montana Field Guide.  .  Retrieved on , from