Montana Field Guide

Fibrous-rooted annual to short-lived perennial. Stems hollow, erect, 15–80 cm. Herbage villous to sparsely tomentose. Leaves short-petiolate below, mainly cauline at flowering; blades oblanceolate to spatulate, dentate to shallowly lobed, 5–15 cm long, not much reduced but becoming sessile above. Inflorescence corymbiform with 6 to 20 heads, somewhat congested. Heads radiate; involucres 5–10 mm high; phyllaries ca. 21, pale, sometimes pink-tipped. Rays ca. 21; ligules 5–9 mm long. Disk corollas 6–10 mm long. Achenes glabrous (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Slightly brackish seasonal wetland margins and wet meadows.

POLLINATORS
The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap: Bombus bifarius, Bombus flavifrons, Bombus frigidus, Bombus huntii, Bombus melanopygus, Bombus mixtus, Bombus sylvicola, Bombus occidentalis, Bombus insularis, Bombus suckleyi, Bombus flavidus, and Bombus kirbiellus (Schmitt 1980, Thorp et al. 1983, Mayer et al. 2000, Wilson et al. 2010, Pyke et al. 2012, Koch et al. 2012, Williams et al. 2014).