Thick-stem Aster - Eurybia integrifolia
MNPS Threat Rank
Perennial from a caudex or short rhizome. Stems sometimes clustered, ascending to erect, 15–60 cm. Herbage: leaves ciliate to pubescent; stems glandular-puberulent. Leaves basal and cauline, petiolate; blades lanceolate to ovate, entire, 2–15 cm long, reduced and sessile upwards. Inflorescence usually narrow, racemose to corymbiform with few to several heads; peduncles stipitate glandular. Involucre campanulate, 7–12 mm high; phyllaries oblanceolate to linear-lanceolate, glandular, ciliate, purple-tipped, white below. Rays 8 to 27; ligules 8–12 mm long. Disk flowers 20 to 50; corolla 6–8 mm long. Achenes fusiform, 4–5 mm long, pubescent (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 vagans
, Bombus ternarius
, and Bombus terricola
(Colla and Dumesh 2010).