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

13. Erigeron jonesii Cronquist, Brittonia. 6: 166. 1947.

Jones’s fleabane

Erigeron wahwahensis S. L. Welsh

Perennials, 10–25(–40) cm; taprooted, caudices simple or branched, retaining old leaf bases. Stems (purplish proximally) decumbent-ascending, moderately hirsute (hairs deflexed), sometimes minutely glandular distally. Leaves basal (persistent) and cauline; basal (erect) blades (3-nerved) oblanceolate to spatulate or subelliptic, 20–80(–180) × 3–13 mm (bases attenuate), entire (apices rounded to obtuse), faces strigoso-hirsute to hirsutulous, eglandular; cauline blades linear-oblong, gradually reduced distally. Heads 1–4 (from branches at midstem or distally). Involucres 5–6(–7) × 9–11(–18) mm. Phyllaries in (2–)3–4 series, sparsely to moderately hirsute, minutely glandular. Ray florets 25–40(–52); corollas white or blue, 4–8 mm, laminae not coiling or reflexing. Disc corollas 3–3.5(–4.8) mm. Cypselae 2.2–2.5 mm, 2-nerved, faces sparsely strigose; pappi: outer of setae, inner of 15–20(–24) bristles.

Flowering May–Aug(–Sep). Open rocky hills, meadows, sagebrush, mountain mahogany, pinyon-juniper, oak-maple, white fir, alpine meadows; (1500–)1800–3400 m; Idaho, Nev., Utah.


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