Erigeron plantagineus Greene, Pittonia 3: 292. 1898; E. eatonii subsp. plantagineus (Greene) Cronquist; E. robertianus Greene

Stems 10–23 cm. Heads 1–4, held just beyond to well beyond basal leaves. Involucres 5–7 × (9–)11–12(–14) mm. Phyllaries sparsely to moderately hirtellous (hairs mostly 0.3–0.8 mm), sometimes sparsely minutely glandular. Ray laminae 5.5–8(–9). Disc corollas 3–4 mm. Cypselae 1.8–2.3 mm; pappi of 16–20 bristles 3–3.5 mm. 2n = 18.

Flowering May–Aug. Open, grassy sites, often with sagebrush scrub, usually over volcanic substrate, less commonly over serpentine; (1000–)1500–2500 m; Calif., Oreg.