149. Erigeron ursinus D. C. Eaton in S. Watson, Botany (Fortieth Parallel). 148. 1871.
Bear River fleabane
Erigeron ursinus var. meyerae S. L. Welsh
Perennials, (1.5–)5–25(–30) cm; rhizomatous, fibrous-rooted, forming diffuse systems of slender, rhizomelike caudex branches. Stems ascending (bases usually purplish), glabrous or sparsely strigose (or hairs loosely spreading), sometimes glandular near heads. Leaves basal (persistent) and cauline; basal (purplish) and proximal blades narrowly oblanceolate to oblong, 20–120 × 2–11 mm, cauline reduced distally, margins entire, ciliate, faces glabrous or loosely strigose, eglandular. Heads 1(–3). Involucres 5–7 × 9–19 mm. Phyllaries in 2–3(–4) series (margins and tips often purplish, loose, linear-lanceolate, apices spreading), sparsely to moderately villous to hirsuto-villous, densely minutely glandular. Ray florets 30–100; corollas pink to bluish purple, 6–15 mm, laminae not reflexing or coiling, sometimes tardily coiling. Disc corollas 3.2–4.7 mm. Cypselae 1.5–2 mm, 2-nerved, faces sparsely strigose; pappi: outer of setae, inner of 10–20 bristles. 2n = 18.
Flowering Jul–Sep. Meadows and grassy openings, sagebrush, aspen, lodgepole pine, pine-fir, spruce-fir; 2400–3100(–3700) m; Ariz., Colo., Idaho, Mont., Nev., N.Mex., Utah, Wyo.