Perennials; (cespitose); caudex branched (with persistent leaves, branches sometimes terminating in sterile rosettes); scapose. Stems unbranched, 0.2-0.9 dm, glabrous throughout. Basal leaves rosulate; sessile; blade oblong to narrowly oblanceolate, 0.2-1 cm × 0.6-2(-4) mm, margins entire, (ciliate, trichomes simple, 0.1-0.5 mm, apex obtuse), surfaces glabrous. Cauline leaves 0. Racemes 3-8-flowered, ebracteate, considerably elongated in fruit; rachis slightly flexuous, glabrous. Fruiting pedicels divaricate-ascending to ascending, straight, 4-13 mm, glabrous. Flowers: sepals oblong, 1.7-2.5 mm, glabrous; petals white, oblanceolate to obovate, 3.5-4.5 × 1.2-2 mm; anthers ovate, 0.3-0.4 mm. Fruits oblong to narrowly so, slightly twisted, flattened, 5-9 × 1.5-3 mm; valves glabrous; ovules 8-16 per ovary; style 0.3-0.9(-1.2) mm. Seeds oblong, 0.9-1.3 × 0.6-0.8 mm. 2n = 32.
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