Smallhead Arnica -
Arnica latifolia var. gracilis
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Stems often in dense clumps and branching above, 10–30 cm. Leaf pairs 2–3, mostly cauline, the uppermost pair often reduced; blades ovate to ovate-lanceolate, margins irregularly serrate, apex acute; lower surface glandular, upper surface stipitate-glandular. Heads rarely only one but mostly 5 to 15. Involucres turbinate-campanulate. Phyllaries 10–16, ovate-lanceolate. Flowers yellow; rays 5–12. Achenes 4.5-7 mm long, black, hairy (hairs duplex) and stipitate-glandular. Pappus barbellate, bristles white (adapted from Wolf, 2006, Fl. N. America, Vol. 21).
July and August.
BC and AB south to OR, UT, and CO (Kartesz 2009).
Observations in Montana Natural Heritage Program Database
Number of Observations:
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Map Help and Descriptions
(Observations spanning multiple months or years are excluded from time charts)
Dry, exposed, rocky, alpine slopes, sometimes subalpine meadows; 1200–2500 m (Wolf, 2005, in Fl. North America, Vol. 21).
The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap:
(Mayer et al. 2000, Wilson et al. 2010).
Literature Cited Above
Legend: 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 References
Legend: View Online Publication Do you know of a citation we're missing? Jones, W. W. 1901. Preliminary flora of Gallatin County. M.S. Thesis. Bozeman, MT: Montana State College. 78 pp. Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 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.