Payson’s groundsel

Senecio dimorphophyllus Greene var. paysonii T. M. Barkley, Trans. Kansas Acad. Sci. 65: 362. 1963

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.

Flowering early Jul–late Aug. Steep, rocky slopes, thin soils in alpine meadows; 2700–3300 m; Idaho, Mont., Nev., Wyo.

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.