Perennials; (cespitose); caudex often branched (with persistent leaf bases, branches elongated, sometimes terminating in sterile rosettes); scapose. Stems unbranched, (0.15-)0.25-0.6 (-0.7) dm, pubescent basally, trichomes simple and 2-or 3-rayed, 0.1-0.5 mm. Basal leaves rosulate; subsessile; petiole (0-0.5 cm) margin ciliate, (trichomes simple, 0.2-1 mm); blade oblanceolate to spatulate or obovate, (0.3-)0.4-1.4(-2) cm × (1.5-)2-4(-6) mm, margins entire, (ciliate as petiole), surfaces usually pubescent, sometimes glabrescent, abaxially with stalked, 2-4-rayed trichomes, 0.1-0.5 mm, adaxially often with simple and 2-rayed trichomes, to 0.9 mm. Cauline leaves 0 (or 1); sessile; blade similar to basal. Racemes (5-)9-18(-23)-flowered, ebracteate, slightly elongated in fruit; rachis not flexuous, pubescent as stems proximally (trichomes often crisped). Fruiting pedicels divaricate-ascending, usually straight, rarely curved upward, 3-6(-10) mm, pubescent, trichomes simple and 2-or 3-rayed, (crisped, 0.1-0.5 mm). Flowers: sepals ovate or broadly oblong, 1.7-2.5 mm, pubescent, (trichomes simple and stalked, 2-rayed); petals yellow, spatulate to oblanceolate, 3-4 × 1.5-2 mm; anthers ovate, 0.4-0.5 mm. Fruits ovoid or ovoid-lanceolate, plane, inflated at least basally, (3-)4-6(-7) × 2-4 mm; valves glabrous or pubescent, trichomes simple and 2-rayed, 0.07-0.3 mm; ovules (4-)8-12 per ovary; style (0.3-)0.4-0.6 mm. Seeds oblong, 1-1.4 × 0.6-0.8 mm. 2n = 26.
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