Stems ascending to erect, simple, 20–60 cm. Herbage villous below, tomentose above. Leaves mainly cauline, sessile; blades ovate, 1–6 cm long, twice pinnately dissected; ultimate lobes ca. 1 mm long and wide. Inflorescence hemispheric 2–10 cm across with numerous heads. Involucre sparsely glandular, 2–3 mm high, ca. 2 mm wide; bracts in 2 series; outer bracts light green, scarious, villous. Rays white, 8 to 10; ligules 1–2 mm long, wider than long. Disk flowers white,10 to 30; corolla 1–2 mm long. Achenes ca. 1 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
The following animal species have been reported as pollinators of this species or genera where their geographic ranges overlap: Bombus bifarius
, Bombus frigidus
, Bombus melanopygus
, Bombus mixtus
, Bombus ternarius
, and Bombus insularis
(Thorp et al. 1983, Wilson et al. 2010, Koch et al. 2012).