Packera pseudaurea

(Rydberg) W. A. Weber & Á. Löve
Phytologia 49: 48. 1981.
Common names: False-gold groundsel
Endemic
Basionym: Senecio pseudaureus Rydberg Bull. Torrey Bot. Club 24: 298. 1897
Treatment appears in FNA Volume 20. Treatment on page 597. Mentioned on page 572, 579.

Perennials, 20–70+ cm; fibrous-rooted (bases simple or branched, horizontal to erect). Stems usually 1, sometimes 2–4, clustered, glabrous or sparsely tomentose proximally. Basal leaves petiolate; blades usually broadly lanceolate to ovate, sometimes subhastate, 20–50+ × 20–40+ mm, bases truncate to subcordate or obtuse, margins crenate, denticulate, bluntly dentate, or sharply dentate (proximal cauline leaves petiolate; margins usually pinnately lobed to laciniate, sometimes subentire). Cauline leaves gradually reduced (becoming sessile, sometimes clasping). Heads 5–20+ in open or congested, subumbelliform arrays. Peduncles bracteate, glabrous. Calyculi inconspicuous. Phyllaries (13–)21(–30+), light green, 3–8 mm, glabrous. Ray florets 0, 8, or 13; corolla laminae 6–10+ mm. Disc florets 70–80+; corolla tubes 2.5–3.5 mm, limbs 2–3 mm. Cypselae 1–1.5 mm, glabrous; pappi 4.5–5.5 mm. 2n = 40, 44, 46, 80.

Distribution

V20-1335-distribution-map.gif

Alta., B.C., Sask., Calif., Colo., Idaho, Iowa, Kans., Minn., Mo., Mont., N.Dak., N.Mex., Nebr., Nev., Oreg., S.Dak., Wash., Wyo.

Discussion

Varieties 3 (3 in the flora).

Selected References

None.

Key

1 Basal leaves: margins sharply dentate; phyllaries 7–8 mm Packera pseudaurea var. pseudaurea
1 Basal leaves: margins usually crenate, denticulate, or bluntly dentate, rarely sharply dentate; phyllaries 3–6 mm > 2
2 Basal leaves: petiole lengths equaling blades, blades broadly ovate, margins usually bluntly dentate or denticulate, rarely sharply dentate; heads 5–12 in congested, cymiform arrays; phyllaries 3–5 mm; s Rocky Mountains Packera pseudaurea var. flavula
2 Basal leaves: petiole lengths 1.5–2 times blades, blades narrowly ovate, margins crenate; heads 6–12 in open or slightly congested, corymbiform or cymiform arrays; phyllaries 4–6 mm; Great Plains Packera pseudaurea var. semicordata
... more about "Packera pseudaurea"
Debra K. Trock +
(Rydberg) W. A. Weber & Á. Löve +
Senecio pseudaureus +
False-gold groundsel +
Alta. +, B.C. +, Sask. +, Calif. +, Colo. +, Idaho +, Iowa +, Kans. +, Minn. +, Mo. +, Mont. +, N.Dak. +, N.Mex. +, Nebr. +, Nev. +, Oreg. +, S.Dak. +, Wash. +  and Wyo. +
Compositae +
Packera pseudaurea +
species +