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

84. Erigeron nauseosus (M. E. Jones) A. Nelson, Bot. Gaz. 37: 270. 1904.

Marysvale fleabane

Erigeron caespitosus Nuttall var. nauseosus M. E. Jones, Proc. Calif. Acad. Sci., ser. 2, 5: 696. 1895

Perennials, 5–15(–25) cm; tap-rooted (caudices with relatively short and thick branches). Stems erect or basally ascending, glabrous, minutely glandular. Leaves basal (persistent) and cauline; basal blades (usually 3-nerved) oblanceolate to obovate or spatulate, 30–80(–100) × (2–)4–15 mm, margins entire, sometimes spreading-ciliate (sometimes with con-spicuously raised primary and secondary venation), faces usually glabrous, sometimes sparsely hispidulous to hirsute, minutely glandular; cauline blades oblong-oblanceolate, little reduced distally. Heads 1(–2). Involucres 5–8 × 8–15 mm. Phyllaries in 2–3(–4) series, glabrous or sparsely strigose, minutely glandular. Ray florets 30–60; corollas white or blue, 6–12 mm, laminae reflexing. Disc corollas 3–5.2 mm. Cypselae 2–2.3 mm, 2-nerved, faces sparsely strigose; pappi: outer of setae, inner of 12–20 bristles.

Flowering May–Aug. Dry, rocky or sandy soils, talus, or cliff ledges and crevices, sagebrush, pinyon-juniper, oak, fir, spruce-aspen; (1600–)2500–3500 m; Nev., Utah.


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