Packera subnuda

(de Candolle) Trock & T. M. Barkley

Sida 18: 635. 1999.

Common names: Cleftleaf groundsel
Basionym: Senecio subnudus de Candolle in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 6: 428. 1838,
Synonyms: Packera buekii Trock & T. M. Barkley Senecio aureus var. subnudus (de Candolle) A. Gray Senecio cymbalarioides Buek
Treatment appears in FNA Volume 20. Treatment on page 599. Mentioned on page 571, 582.

Perennials, 10–30+ cm; fibrous-rooted and/or rhizomatous (bases relatively slender, horizontal to suberect). Stems usually 1, rarely 2–3, loosely clustered, glabrous. Basal leaves petiolate; blades ovate, obovate, or elliptic, 20–40+ × 10–30+ mm, bases tapering to contracted, margins subentire to crenate-dentate. Cauline leaves abruptly reduced (sessile, often weakly clasping, dentate to subentire; distals sessile, lanceolate, weakly clasping, entire or dentate). Heads 1(–5; sometimes subtended by 2 relatively large bractlets). Peduncles sparsely bracteate or ebracteate, glabrous. Calyculi (bractlets frequently cyanic). Phyllaries (13–)21, green (tips sometimes cyanic), 5–8+ mm, glabrous. Ray florets 13; corolla laminae 7–12+ mm. Disc florets 40–55+; corolla tubes 2.5–3.5 mm, limbs 2.5–3.5 mm. Cypselae 1.5–2.5 mm, glabrous; pappi 4–6 mm. 2n = 46, 90.



Alta., B.C., Alaska, Calif., Idaho, Mont., Nev., Oreg., Wash., Wyo.


Varieties 2 (2 in the flora).

Selected References



1 Heads (1–)2–3; phyllaries reddish or cyanic, hairy (hairs reddish, multicellular) Packera subnuda var. moresbiensis
1 Heads 1(–3); phyllaries green (tips sometimes red), glabrous Packera subnuda var. subnuda
... more about "Packera subnuda"
Debra K. Trock +
(de Candolle) Trock & T. M. Barkley +
Senecio subnudus +
Cleftleaf groundsel +
Alta. +, B.C. +, Alaska +, Calif. +, Idaho +, Mont. +, Nev. +, Oreg. +, Wash. +  and Wyo. +
Illustrated +  and Endemic +
Packera buekii +, Senecio aureus var. subnudus +  and Senecio cymbalarioides +
Packera subnuda +
species +