Montana Field Guide

Taprooted biennial. Stems erect, mostly unbranched 20–100 cm. Herbage tomentose. Leaves short-winged-petiolate, oblong to elliptic, 10–25 cm long, pinnately lobed. Inflorescence few to several heads on stem tips or upper leaf axils; peduncles 0–10 cm long. Involucres hemispheric, 3–4 cm high, sparsely arachnoid; phyllaries imbricate in 6 to 9 series, lanceolate, green, resinous-keeled; the outer appressed; the inner expanded, erose; spines 2–4 mm long. Disk corollas white to pinkish, 20–35 mm long. Achenes 5–7 mm long (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Grasslands, woodlands; plains (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 vagans, Bombus appositus, Bombus auricomus, Bombus bifarius, Bombus borealis, Bombus centralis, Bombus fervidus, Bombus flavifrons, Bombus frigidus, Bombus huntii, Bombus mixtus, Bombus nevadensis, Bombus rufocinctus, Bombus sylvicola, Bombus ternarius, Bombus terricola, Bombus sitkensis, Bombus occidentalis, Bombus pensylvanicus, Bombus bimaculatus, Bombus griseocollis, Bombus impatiens, Bombus insularis, Bombus suckleyi, Bombus bohemicus, and Bombus flavidus (Thorp et al. 1983, Mayer et al. 2000, Wilson et al. 2010, Colla and Dumesh 2010, Colla et al. 2011, Koch et al. 2012, Williams et al. 2014, Tripoldi and Szalanski 2015).