Packera dimorphophylla var. paysonii

(T. M. Barkley) Trock & T. M. Barkley

Sida 18: 386. 1998.

Common names: Payson’s groundsel
Basionym: Senecio dimorphophyllus var. paysonii T. M. Barkley Trans. Kansas Acad. Sci. 65: 362. 1963
Treatment appears in FNA Volume 20. Treatment on page 586. Mentioned on page 584.

Plants 10–35 cm. Stems 1 (lax), frequently 1–3 times branched. Basal leaves: petioles narrowly, if at all, winged, lengths 1–2 times blades; blades orbiculate to subreniform, 1–5+ × 1–4 cm, bases subcordate or abruptly contracted. Cauline leaves clasping; auriculate.

Phenology: Flowering early Jul–late Aug.
Habitat: Steep, rocky slopes, thin soils in alpine meadows
Elevation: 2700–3300 m


Variety paysonii is known only from northwestern Wyoming, adjacent Montana and Idaho, and Elko County, Nevada. Its petioles are slender and their lengths are 1–2 times their blades.

Selected References


Lower Taxa

Debra K. Trock +
(T. M. Barkley) Trock & T. M. Barkley +
Senecio dimorphophyllus var. paysonii +
Payson’s groundsel +
Idaho +, Mont. +, Nev. +  and Wyo. +
2700–3300 m +
Steep, rocky slopes, thin soils in alpine meadows +
Flowering early Jul–late Aug. +
Compositae +
Packera dimorphophylla var. paysonii +
Packera dimorphophylla +
variety +