Agoseris heterophylla var. heterophylla
Phenology: Flowering Mar–Sep.
Habitat: Wet to dry, mostly seasonal habitats in deserts, grasslands, chaparral, steppe, oak woodlands, and open pine forests, often disturbed sites
Elevation: 0–2300 m
B.C., Ariz., Calif., Idaho, Mont., Nev., N.Mex., Oreg., Utah, Wash., Mexico (Baja California, Guadalupe Island), Europe (Sweden).
Variety heterophylla is the most widespread of the varieties. It exhibits remarkable variation in cypsela morphology. K. L. Chambers (1963b) demonstrated that this small-flowered variety is strongly autogamous and does not outcross. The same breeding system may be present in other Agoseris taxa that exhibit reduced corolla and anther size (e.g., A. apargioides var. maritima, A. grandiflora, A. aurantiaca). Hybridization does not appear to be common; apparent intermediates with A. apargioides and A. hirsuta are known.