Senecio glauciifolius Rydberg

Heads 10–30(–40+). Calyculi: bractlets prominent (lengths of at least some to about ³ / 4 phyllaries). Involucres 7–10 mm diam. Phyllaries 6–8 mm, tips green or weakly, if at all, black. Ray corolla laminae 5–10 mm.

Flowering late spring–early fall. Grassy or open, rocky sites; 200–2300 m; Alta., B.C., Man., N.W.T., Ont., Sask.; Alaska, Mont., N.Dak., S.Dak., Wyo.

Variety eremophilus may be expected as a casual weed or waif in the cooler portions of the flora. It has been reported as a waif in New York.