Perennials; (cespitose, densely pulvinate); caudex branched (covered with persistent leaves, branches creeping, sometimes terminating in sterile rosettes); scapose. Stems unbranched, 0.05-0.4 dm, densely pubescent throughout, trichomes simple, 0.4-0.8 mm, and stalked, 2-5-rayed, 0.1-0.5 mm. Basal leaves (densely imbricate); rosulate; sessile; blade oblong to linear-oblanceolate, 0.2-0.8 cm × 0.5-1.5 mm, margins entire, (ciliate, trichomes simple and spurred, 0.3-1.2 mm), surfaces densely pubescent, abaxially with stalked, 2-12-rayed stellate trichomes, 0.1-0.6 mm, adaxially with simple and 2-rayed ones, 0.3-0.8 mm. Cauline leaves 0. Racemes 2-12-flowered, ebracteate, slightly elongated in fruit; rachis not flexuous, pubescent as stem. Fruiting pedicels divaricate-ascending, straight, 1-5 mm, pubescent, trichomes simple (0.3-0.9 mm) and stalked, 2-5-rayed (0.1-0.5 mm). Flowers: sepals oblong, 1.5-2.5 mm, pubescent, (trichomes simple and short-stalked, 2-4-rayed); petals bright yellow, oblanceolate to spatulate, 2-3.5(-4) × 1.5-2 mm; anthers oblong, 0.5-0.6 mm. Fruits often ovoid, plane, slightly inflated basally (symmetric), (2.5-)3-4(-5) × 1.5-3.5 mm; valves densely pubescent, trichomes 2-6-rayed, 0.05-0.4 mm, occasionally some simple; ovules 4-8 (-12) per ovary; style 0.2-0.6(-0.8) mm. Seeds oblong, 1.2-1.8 × 0.8-1.1 mm. 2n = 42.
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