Greene’s narrow-leaf fleabane

Erigeron angustatus (A. Gray) Greene, Bull. Calif. Acad. Sci. 1: 88. 1885, not Fries ex Nyman 1879, based on E. inornatus (A. Gray) A. Gray var. angustatus A. Gray in A. Gray et al., Syn. Fl. N. Amer. 1(2): 215. 1884

Perennials, 30–90 cm; taprooted, caudices simple or branches relatively short and slender, woody. Stems erect (arising from rootcrowns or caudex branches), glabrous, eglandular. Leaves mostly cauline; blades linear, 10–60 × 0.1–1(–2) mm, barely reduced distally, margins entire, ciliate, faces glabrous, eglandular. Heads (discoid) 1 or 2–5 in loosely corymbiform arrays. Involucres 5.5–7.5 × 8–12 mm. Phyllaries in 3–5 series (apices purplish), glabrous, minutely glandular. Ray (pistillate) florets 0. Disc corollas 4.2–6 mm (throats slightly indurate, not inflated). Cypselae 2.4–2.8 mm, 2-nerved, faces sparsely strigose; pappi: outer of setae, inner of 26–38 bristles.

Flowering May–Sep. Chaparral or open woods, ponderosa or jeffrey pine, Douglas fir, usually over serpentine, sometimes rocky alluvium; of conservation concern; (100–)500–1600 m; Calif.