Senecio bigelovii var. hallii
Proc. Acad. Nat. Sci. Philadelphia 15: 67. 1864.
Herbage often floccose-tomentose, especially among heads and on abaxial faces of leaves, sometimes unevenly glabrescent. Leaves: blades of proximal usually tapered to petioles; mid and distal leaves weakly, if at all, clasping. Heads (1–) 3–7. Phyllaries mostly 21, (7–) 8–12 mm.
Phenology: Flowering summer.
Habitat: Grassy damp or drying sites in open conifer-dominated areas
Elevation: 1700–3500 m
Ariz., Colo., N.Mex., Utah, Wyo.