Perennials; caudex simple or branched (sometimes with persistent leaf bases); not scapose. Stems unbranched, (0.7-)1.1-3.7(-5.3) dm, pubescent throughout (sparsely so distally), trichomes simple, malpighiaceous, or sessile and 4-rayed, 0.15-0.5 mm, (2 rays parallel to stem axis longer). Basal leaves rosulate; petiolate; petiole sometimes ciliate, (trichomes simple); blade oblanceolate to spatulate or obovate, (1-)1.5-4.4(-6.3) cm × (3-)5-12(-15) mm, margins entire or dentate, surfaces pubescent with sessile, often 4-rayed trichomes, 0.1-0.6 mm (longest rays parallel to midvein, lateral rays sometimes reduced to tiny spurs), sometimes malpighiaceous trichomes present. Cauline leaves 4-12(-17); sessile; blade broadly ovate to lanceolate or oblong, margins entire or dentate, (ciliate or not), surfaces pubescent as basal or adaxially also with simple trichomes. Racemes (10-)16-49(-61)-flowered, ebracteate, elongated in fruit; rachis not flexuous, pubescent as stem. Fruiting pedicels horizontal to divaricate-ascending, straight or curved upward, (5-)7-20(-26) mm, glabrous or pubescent as rachis abaxially. Flowers: sepals ovate, (2.2-)2.5-4 mm, glabrous or pubescent, (trichomes simple and malpighiaceous); petals yellow, oblanceolate, 4-6.5 × 1-2.5 mm; anthers oblong, 0.5-0.7 mm. Fruits lanceolate to oblong or elliptic, plane, flattened, (6-)7-13 × 2-3.5 mm; valves glabrous or puberulent, trichomes simple and sessile, 2-rayed, 0.03-0.3 mm; ovules 12-24 per ovary; style (0.5-)1-2.7 mm. Seeds ovoid, 1-1.4 × 0.7-0.9 mm. 2n = 40.
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