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

124. Erigeron yukonensis Rydberg, Bull. New York Bot. Gard. 2: 185. 1901.

Yukon fleabane

Erigeron glabellus Nuttall var. yukonensis (Rydberg) Hultén

Perennials, 10–30(–40) cm; rhizomatous, fibrous-rooted, caudices or rhizomes sometimes resembling taproots, multicipital. Stems erect (often purplish proximally), sparsely to moderately hirsute to villoso-hirsute, eglandular. Leaves basal (persistent) and cauline; proximal blades narrowly oblanceolate, rarely oblanceolate-obovate, (10–)40–160 × 2–8 mm, mid and distal narrowly lanceolate, reduced, margins entire, faces sparsely hirsute or glabrous, eglandular. Heads 1–2(–4) (from branches at midstem). Involucres 6–10 × 12–19 mm. Phyllaries in 2(–3) series (linear-lanceolate, apices linear-acuminate), sparsely to moderately woolly-villous (hairs whitish, flattened, with clear cross walls), sometimes sparsely minutely glandular. Ray florets 42–82; corollas white to pink or pink-purple, 10–15 mm (mostly 1–2 mm wide), laminae coiling. Disc corollas 3.8–5.2 mm. Cypselae 1.7–2 mm, 2-nerved, faces strigose; pappi: outer of setae or scales, inner of 15–20 bristles.

Flowering (Jun–)Jul–Aug(–Sep). Rocky sites and meadows, near timberline and above; 2800–3200 m; N.W.T., Nunavut, Yukon; Alaska.


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