Perennials; (densely cespitose); caudex branched (densely covered with persistent leaves, branches sometimes terminating in sterile rosettes); scapose. Stems unbranched, (0.1-)0.3-1(-1.3) dm, hirsute throughout, trichomes simple, 0.4-1 mm, and 2-4-rayed, 0.1-0.6 mm. Basal leaves (densely imbricate); rosulate; sessile; blade narrowly oblanceolate to oblong-linear, 0.3-1.2(-1.5) cm × 1-2 mm, margins entire, (ciliate, trichomes simple, 0.3-1.2 mm), surfaces pubescent abaxially with stalked, 2-4-rayed trichomes, 0.08-0.45 mm, (midvein obscure), adaxially glabrous proximally, sparsely pubescent distally with mostly simple trichomes. Cauline leaves 0. Racemes 4-15-flowered, ebracteate, elongated in fruit; rachis not flexuous, hirsute as stem. Fruiting pedicels ascending, straight, (2-)4-13(-18) mm, hirsute as stem. Flowers: sepals oblong, 2.5-3.5 mm, hirsute, (trichomes simple and stalked, 2-4-rayed); petals white, obovate, 5-6.5 × 2-3.5 mm; anthers ovate, 0.5-0.6 mm. Fruits ovate to broadly oblong or elliptic, plane, flattened, (3-) 4-7(-10) × (2.5-)3.5-5 mm; valves pubescent, trichomes simple and short-stalked, 2(-4)-rayed, 0.06-0.5 mm; ovules 8-12 per ovary; style (0.8-)1-1.7(-2) mm. Seeds oblong, 1.4-1.8 × 0.8-1 mm. 2n = 54.
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