Involucral bracts obtuse. Fruits dark reddish brown to black, ribs inconspicuous, fruit surface tuberculate, mucilaginous when wetted.

Flowering late spring-summer. Gravelly and sandy soils, sagebrush scrub, shadscale scrub, pinyon-juniper woodlands; 900-2500 m; Ariz., Calif., Colo., Nev., Utah.