Annual. Stems erect, 30–100 cm. Herbage glabrous to sparsely puberulent. Leaves distinctly petiolate; blades divided into 3 or 5 lanceolate, serrate leaflets, 1–8 cm long. Inflorescence: heads usually few; peduncles 2–12 cm long. Involucre: outer phyllaries 10–16, oblanceolate, 8–30 mm long, ciliate, sometimes serrulate; inner phyllaries ovate, 6–8 mm long. Rays absent or 3 to 5 reduced. Disk corollas 2–3 mm long. Pappus 2, awns 2–4 mm long. Achenes flattened, 5–12 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 griseocollis
and Bombus impatiens
(Plath 1934, Colla and Dumesh 2010).