Perennials; (usually cespitose); caudex simple or branched (poorly developed, with persistent leaf remains); sometimes scapose. Stems un-branched, (0.05-)0.1-0.4 dm, usually pubescent throughout, rarely sparsely pubescent or glabrous distally, trichomes simple and 2-rayed, (often crisped), 0.1-0.6 mm. Basal leaves rosulate; subsessile or shortly petiolate; petiole margin ciliate or not; blade narrowly oblanceolate, (0.3-)0.5-1.6(-2) cm × (1-)1.5-3(-4) mm, margins usually entire, rarely subapically denticulate, (ciliate or not), surfaces pubescent with simple and stalked, 2-rayed trichomes, 0.1-0.7 mm, (midvein obscure abaxially). Cauline leaves 0-2 (or 3); sessile; blade ovate to oblong, margins entire, surfaces pubescent as basal. Racemes (3-)6-13(-17)-flowered, ebracteate or proximalmost 1 (or 2) flowers bracteate, not or slightly elongated in fruit; rachis not flexuous, usually pubescent as stem, rarely glabrous. Fruiting pedicels divaricate-ascending, straight, 1-2.5(-4) mm, usually pubescent as stem, rarely glabrous. Flowers: sepals (persistent), oblong, 1-1.5 mm, subapically sparsely pubescent, (trichomes simple); petals white, spatulate, 1.5-2 × 0.5-0.6 mm; anthers ovate, 0.15-0.2 mm. Fruits ovoid to subellipsoid, plane, slightly inflated basally, (2-)3-5 × (1.2-)1.5-2.5 mm; valves usually puberulent, rarely glabrous, trichomes simple, 0.05-0.2 mm; ovules 12-20 per ovary; style 0.1-0.2 mm. Seeds ovoid, 0.6-0.8 × 0.4-0.6 mm.
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