Packera flettii

(Wiegand) W. A. Weber & Á. Löve

Phytologia 49: 46. 1981.

Common names: Flett’s ragwort
Basionym: Senecio flettii Wiegand Bull. Torrey Bot. Club 26: 137, plate 355, fig. 2. 1899
Treatment appears in FNA Volume 20. Treatment on page 587. Mentioned on page 573, 575.
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Perennials, 10–40+ cm; rhizomatous (rhizomes horizontal to erect). Stems 1 or 2–5 (often scapiform), loosely clustered, glabrous or leaf axils sparsely hairy. Basal leaves (and proximal cauline) petiolate; blades obovate to ovate or sublyrate, 30–60+ × 10–40+ mm, bases tapering, margins deeply dissected or pinnatifid, ultimate margins crenate to crenate-dentate. Cauline leaves abruptly reduced or 0 (sessile; ovate to obovate, dissected or pinnatifid). Heads 4–10+ in subumbelliform cymiform arrays. Peduncles inconspicuously bracteate or ebracteate, glabrous. Calyculi 0 or inconspicuous. Phyllaries (8–)13, light green (tips yellowish), 4–7 mm, glabrous. Ray florets 5 or 8; corolla laminae 5–10 mm. Disc florets 20–30+; corolla tubes 2.5–3.5 mm, limbs 2.5–3.5 mm. Cypselae 1–1.5 mm, glabrous; pappi 4–4.5 mm. 2n = 40.

Phenology: Flowering early Jul–mid Aug.
Habitat: Exposed slopes, rocky or gravelly soils
Elevation: 700–2000 m


Packera flettii is known from the Olympic Mountains and near Mt. Rainer in Washington and coastal mountains of Clatsop County, Oregon. It has a chromosome number unique in the genus and is not known to hybridize with other species of Packera.

Selected References


Lower Taxa