Senecio bigelovii var. bigelovii
Herbage glabrous or nearly so. Leaves: blades of proximal often abruptly contracted or at least obtuse at bases; mid and distal leaves clasping. Heads usually 6–12 (–20). Phyllaries mostly 13, 6–8+ mm.
Phenology: Flowering mid summer.
Habitat: Meadows, rocky, open sites in conifer-dominated areas
Elevation: 1800–3000 m
Plants of var. bigelovii from the north of the range tend to be intermediate with var. hallii.