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FNA | Family List | FNA Vol. 20 | Asteraceae | Erigeron

9. Erigeron maniopotamicus G. L. Nesom & T. W. Nelson, Sida. 21: 673, fig. 1. 2004.

Mad River fleabane

Perennials, 10–22(–27) cm, tap-rooted, caudices usually simple, rarely with branches to 20 cm. Stems ascending to decumbent-ascending (usually basally purplish), sparsely to densely strigose (basal cells inclined, hairs even-width), eglandular. Leaves basal (persistent) and cauline; blades (strongly to weakly 3-nerved) oblanceolate to spatulate-oblanceolate, 30–100 × (3–)5–12(–14) mm, cauline gradually reduced distally or not, usually continuing to near heads, margins entire, faces hirsuto-pilose to weakly pilose, eglandular. Heads 1(–4) (on peduncles 0.5–5) cm, held well beyond leaves at peak flowering, from branches near midstem or slightly more distal). Involucres (5–)6–7 × 9–12(–14) mm. Phyllaries in 2–3(–4) series, (elliptic- to oblong-oblanceolate, abruptly acuminate), hirsuto-strigose to -pilose, densely villous at bases, usually eglandular, sometimes sparsely glandular. Ray florets (16–)21–33; corollas white to pinkish or purplish, 10–12 mm, laminae not (or weakly) coiling or reflexing. Disc corollas 3.2–3.8 mm. Cypselae 2–2.5 mm, 2-nerved, faces sparsely strigose; pappi: outer of setae, inner of 16–20 bristles.

Flowering Jun–Aug. Dry, barren meadows and openings in mixed conifer woodlands; of conservation concern; 1300–1500 m; Calif.


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