Perennials; (densely cespitose); caudex branched (covered with persistent, somewhat thickened, dry petioles); not scapose. Stems unbranched, 0.08-0.6 dm, densely to moderately pubescent throughout, trichomes simple and stalked, 2-or 3-rayed, 0.2-1 mm. Basal leaves rosulate; petiolate; petiole ciliate, (trichomes simple, 0.2-1 mm); blade linear to linear-oblanceolate, (0.4-)0.6-1.5(-2) cm × 1-2 mm, margins entire, (pubescent as petiole), surfaces pubescent abaxially with simple and stalked, 2-or 3-rayed trichomes, 0.1-0.4 mm, adaxially glabrate or subapically sparsely pubescent with simple trichomes. Cauline leaves 1-4; sessile; blade linear to linear-oblanceolate, margins entire, surfaces pubescent as basal. Racemes 5-12 (-16)-flowered, usually ebracteate, rarely proximalmost flowers bracteate, slightly elongated in fruit; rachis not flexuous, pubescent as stem. Fruiting pedicels divaricate-ascending, straight or slightly curved upward, 1.5-6 mm, pubescent as stem. Flowers: sepals ovate, 1.5-2 mm, pubescent, (trichomes simple and short-stalked, 2-or 3-rayed); petals bright yellow, spatulate, 3-4.5 × 1-2 mm, (flared, clawed); anthers ovate, 0.3-0.5 mm. Fruits lanceolate to oblong-lanceolate, slightly twisted or plane, flattened, 4-12 × 1.5-3 mm; valves glabrous or pubescent, trichomes simple, 0.07-0.2 mm; ovules 16-20 per ovary; style 0.4-1.2 mm. Seeds ovoid, 1-1.4 × 0.7-1 mm. 2n = 24 ± 3.
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