Annuals or perennials; (short-lived); caudex often simple (poorly developed); not scapose. Stems unbranched or branched, 0.6-3(-3.7) dm, pubescent throughout, trichomes simple, 0.4-0.9 mm, and 2-4-rayed, 0.05-0.4 mm. Basal leaves rosulate; subsessile; petiole base ciliate, (trichomes simple, 0.3-0.9 mm); blade oblanceolate, 1-3.5 cm × 4-7(-12) mm, margins entire or denticulate, surfaces pubescent, abaxially with stalked, (2-)4-rayed trichomes, 0.1-0.5 mm, adaxially with simple trichomes, 0.2-0.6 mm, with smaller, 2-4-rayed ones. Cauline leaves (1 or) 2-6(-8); sessile; blade lanceolate or oblanceolate to ovate, margins entire or denticulate, surfaces pubescent as basal. Racemes (5-)10-35(-47)-flowered, ebracteate, elongated in fruit; rachis not flexuous, pubescent as stem. Fruiting pedicels divaricate-ascending, straight or only slightly curved upward, (1.5-)3-8(-10) mm, pubescent throughout, trichomes simple and stalked, 2-4-rayed. Flowers: sepals ovate, 2-2.7 mm, pubescent, (trichomes simple and short-stalked, 2-rayed); petals pale yellow (fading white), oblanceolate, 2.5-3.7 × 0.9-1.2 mm; anthers ovate, 0.2-0.3 mm. Fruits narrowly elliptic to lanceolate, plane, flattened, (7-)10-16(-19) × 2-3.5 mm; valves pubescent, trichomes simple, spurred, and short-stalked, 2-rayed, 0.05-0.2(-0.3) mm; ovules 20-36(-42) per ovary; style 0.2-0.6(-0.8) mm. Seeds oblong, 0.9-1.3 × 0.6-0.7 mm. 2n = 44.
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