Erigeron howellii
in A. Gray et al., Syn. Fl. N. Amer. 1(2): 209. 1884.
Perennials, 20–50 cm; rhizomatous, fibrous-rooted, caudices simple, thick. Stems erect to basally ascending, proximally glabrous, distally sparsely to densely strigillose, eglandular. Leaves basal (persistent) and cauline; basal and proximal cauline blades spatulate, 50–200 × 15–45 mm, little reduced distally until distal to midstems, margins entire or shallowly serrate to denticulate, finely ciliate, faces glabrous, eglandular; mid-blades ovate to cordate (bases clasping to subclasping). Heads 1. Involucres 6–8 × 12–20 mm. Phyllaries in 2–3 (–4) series, glabrous, densely minutely glandular. Ray-florets 30–50; corollas white, 13–25 mm (mostly 1.5–3 mm wide), laminae coiling. Disc corollas 4–5 mm. Cypselae 2.5–3 mm, subterete, (4–) 5 (–6) -nerved, faces sparsely strigose; pappi: outer of setae, inner of 20–30 bristles.
Phenology: Flowering May–Jul.
Habitat: Drainage of Columbia River, steep north-facing slopes with little soil, sometimes in seepage, commonly with Douglas fir
Elevation: (60–)500–1200(–1500) m
Discussion
Of conservation concern.
Selected References
None.