Physaria hitchcockii

Perennials; (forming loose mats); caudex (buried), branched; densely pubescent, trichomes (short-stalked), 4-6-rayed, rays distinct, bifurcate, (rough-tuberculate). Stems few to several from base, prostrate to erect or spreading, 0.05-0.5(-1.2) dm. Basal leaves: (petiole and blade differentiated or not); blade spatulate to elliptic or linear or narrowly oblanceolate, 0.5-1.5 (-2.5) cm, margins entire. Cauline leaves similar to basal, smaller. Racemes dense. Fruiting pedicels (ascending, straight or slightly curved), 2-6 mm. Flowers: sepals narrowly lanceolate to lanceolate, 2.8-6 mm; petals (pale to deep yellow), narrowly lanceolate to oblanceolate, 5-9 mm, (claw undifferentiated from blade). Fruits (sessile or substipitate), globose or subglobose to obovoid, not or slightly inflated, 3-6 mm, (firm, apex acute); valves (reddish in age, not retaining seeds after dehiscence), glabrous throughout; replum as wide as or wider than fruit; ovules 4-8 per ovary; style 1.7-6 mm. Seeds flattened.