Racemes usually loose, rarely somewhat congested. Fruiting pedicels 6-12 mm. Fruit valves slightly inflated, membranous; trichomes appressed. 2n = 8, 10, 16, 24.

Flowering May-Jun. Steep hillsides, decomposed granite, rocky banks, shale hills, rocky ravines, sagebrush and pinyon-juniper areas; 1700-2900 m; Colo., N.Mex.