Perennials; (cespitose); caudex branched (with some persistent leaf bases); scapose. Stems unbranched, (0.4-)0.6-1.5(-2.7) dm, pubescent throughout, trichomes simple, 0.5-1.5 mm, and 2-4-rayed ones, 0.05-0.3 mm, (sometimes 2-4-rayed ones distally). Basal leaves rosulate; subsessile or shortly petiolate; petiole ciliate throughout; blade oblanceolate to spatulate or obovate, (0.6-) 0.8-4.5(-6) cm × 2-12(-16) mm, margins usually entire, rarely obscurely dentate, (not ciliate), surfaces abaxially pubescent with stalked, (2-)4-rayed trichomes, 0.2-1 mm, adaxially with stalked, 2-4-rayed trichomes, 0.3-0.8 mm, and simple ones, 0.5-1.9 mm. Cauline leaves 0. Racemes (15-)30-75-flowered, ebracteate, elongated in fruit; rachis not flexuous, pubescent, trichomes 2-4-rayed, sometimes with simple ones. Fruiting pedicels horizontal to divaricate-ascending, straight, 3-11(-16) mm, pubescent, trichomes 2-4-rayed, sometimes with simple ones. Flowers: sepals broadly ovate, 1.8-3.5 mm, pubescent, (trichomes simple and short-stalked, 2-4-rayed); petals pale yellow, oblan-ceolate, 4-7 × 1.5-2.5 mm; anthers ovate to oblong, 0.4-0.7 mm. Fruits ovoid-ellipsoid to oblong, plane, inflated basally, 3-8 × 1.8-3.5 mm; valves hirsute, trichomes simple and spurred, (0.2-)0.3-1 mm, or puberulent, trichomes short-stalked, 2-4-rayed, 0.1-0.2 mm; ovules 8-12(-18) per ovary; style 0.6-2(-2.5) mm. Seeds oblong, 0.9-1.2 × 0.6-0.8 mm. 2n = 30.

Varieties 2 (2 in the flora): Arizona.

Lower Taxa

• Draba asprella var. asprella
• Draba asprella var. stelligera O. E. Schulz