Montana Field Guide

Plants from a stout horizontal rhizome. Stems erect, 25–80 cm. Herbage sparsely arachnoid. Leaves basal and cauline; blades ovate to oblanceolate, 4–15 cm long, entire to minutely dentate, becoming linear-lanceolate and sessile above. Inflorescence corymbiform of 7 to 30 heads. Heads radiate; involucres 5–9 mm high; phyllaries ca. 21, sparsely arachnoid, black-tipped. Rays ca. 13; ligules 5–9 mm long. Disk corollas 5–8 mm long. Achenes 1–3 mm long, sparsely puberulent (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Moist to wet meadows, thickets; upper montane, subalpine (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

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).