Stems pubescent with 3- or 4-rayed trichomes. Racemes on all or most of scape. Fruits oblong to broadly ovate, 3-6(-8) mm; valves: trichomes stalked and 4-rayed, sometimes with 2- or 3-rayed ones; ovules 12-24 per ovary.

Flowering Feb-Mar. Rocky slopes, gravelly soil in desert scrub communities, grassy slopes, arroyos, gullies, washes, ledges, under shrubs; 200-1800 m; Ariz., Calif.; Mexico (Baja California, Sonora).