Perennials; (cespitose); caudex simple or branched (with some persistent leaf bases); scapose. Stems unbranched, 0.3-1(-1.3) dm, often glabrous throughout, sometimes sparsely pubescent proximally, trichomes simple and stalked, 2-rayed, 0.2-1 mm. Basal leaves rosulate; sessile; blade (fleshy), oblanceolate to linear, (0.4-)0.5-1.4(-2) cm × (1-)1.5-3(-4) mm, margins entire, (ciliate at least apically, trichomes simple and 2-rayed), surfaces usually glabrous, rarely sparsely pubescent with simple and stalked, 2-(or 3-)rayed trichomes, 0.2-1 mm, (midvein obscure). Cauline leaves 0. Racemes (6-)10-28(-40)-flowered, ebracteate, elongated in fruit; rachis not flexuous, glabrous. Fruiting pedicels divaricate-ascending, straight, (3-)5-10(-17) mm, glabrous. Flowers: sepals broadly ovate, 1.7-2.5 mm, usually glabrous, rarely pubescent, (trichomes simple and short-stalked, 2-rayed); petals white, spatulate to obovate, 3-5 × 2-3 mm; anthers oblong, 0.5-0.7 mm. Fruits ovoid to lanceolate, plane, inflated at least basally, 4-8 (-10) × 2.5-4 mm; valves glabrous or sparsely puberulent, trichomes simple, 0.02-0.1 mm; ovules 6-12 per ovary; style 0.2-0.9 mm. Seeds ovoid, 1-1.5 × 0.7-1.1 mm. 2n = 26.
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