Leaves: stipular glands absent. Flowers: stamens spreading; styles 5–11 mm, stigmas light gray. 2n = 30.

Flowering May–Sep. Short grass prairie, fields, roadsides, on clay, rarely calcareous soils; (300–)1000–2300 m; Alta., Man., Sask.; Ark., Colo., Ill., Iowa, Kans., Minn., Mo., Mont., Nebr., N.Mex., N.Dak., Okla., S.Dak., Tex., Wis., Wyo.; Mexico (Coahuila, Durango).