Ray corollas white. Disc corollas: indurate portions shiny, glabrous. Pappi: outer of inconspicuous, well-developed setae, inner of 15–27 bristles.

Flowering May–Jul(–Aug). Prairies, open and dry slopes, often with sagebrush; 1000–2600 m; Alta., Sask.; Colo., Kans., Mont., Nebr., N.Dak., S.Dak., Wash., Wyo.

A report of var. pumilus from Yukon is based on a misidentification of Erigeron caespitosus.