Search Field Guide
Advanced Search
MT Gov Logo
Montana Field Guide

Montana Field Guides

Clasping Arnica - Arnica amplexicaulis
Other Names:  Arnica lanceolata ssp. prima

Native Species

Global Rank: G5
State Rank: S4

Agency Status
MNPS Threat Rank:
C-value: 5

External Links

General Description
Stems solitary or clustered, erect, 20–80 cm. Herbage puberulent to villous. Leaves mostly cauline, sessile, 4 to 7 pairs, dentate, lanceolate to elliptic, 5–15 cm long. Heads 3 to 10; involucre campanulate, 8–15 mm high, glandular, septate-villous. Rays 8 to 14; ligules 1–2 cm long. Pappus subplumose, brownish. Achenes glabrous, 4–8 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
AK south to CA, NV, UT and WY (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 12

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



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

Moist forest, woodlands, often along streams; montane (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap: Bombus bifarius, Bombus mixtus, and Bombus occidentalis (Mayer et al. 2000, Wilson et al. 2010).

  • Literature Cited AboveLegend:   View Online Publication
    • Mayer, D.F., E.R. Miliczky, B.F. Finnigan, and C.A. Johnson. 2000. The bee fauna (Hymenoptera: Apoidea) of southeastern Washington. Journal of the Entomological Society of British Columbia 97: 25-31.
    • Wilson, J.S., L.E. Wilson, L.D. Loftis, and T. Griswold. 2010. The montane bee fauna of north central Washington, USA, with floral associations. Western North American Naturalist 70(2): 198-207.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
  • Web Search Engines for Articles on "Clasping Arnica"
Login Logout
Citation for data on this website:
Clasping Arnica — Arnica amplexicaulis.  Montana Field Guide.  .  Retrieved on , from