Perennials; (cespitose, sometimes forming mats); caudex branched (covered with persistent leaf bases); not scapose. Stems unbranched, 0.4-1.2 dm, pubescent throughout, trichomes minutely stalked, stellate, 8-12-rayed, (non-crisped), 0.03-0.3 mm, sometimes with simple and 2-rayed ones, to 0.3 mm. Basal leaves rosulate; petiole (obsolete), margin usually not ciliate, (trichomes, when present, simple and 2-rayed, 0.2-0.35 mm); blade oblanceolate to obovate, 0.4-1 cm × 1-3 mm, margins denticulate or entire, surfaces pubescent with short-stalked, stellate, (non-crisped), 8-12-rayed trichomes, 0.05-0.2 mm, (midvein obscure abaxially). Cauline leaves (1 or) 2-7; sessile; blade broadly ovate, margins usually denticulate, rarely entire. Racemes 4-10-flowered, proximalmost 1-5 flowers bracteate, elongated; rachis not flexuous, pubescent as stem. Fruiting pedicels ascending, straight, (4-)6-13(-20) mm, pubescent as stem. Flowers: sepals ovate, 1.5-2.2 mm, pubescent, (trichomes simple and short-stalked, 2-5-rayed); petals white, obovate, 2-3.5 × 1.5-2 mm; anthers ovate, 0.2-0.3 mm. Fruits linear to narrowly lanceolate, slightly twisted or plane, flattened, 5-11 × 1.1-1.6(-2) mm; valves glabrous; ovules 16-20 per ovary; style 0.1-0.3 mm. Seeds ovoid, 0.6-0.9 × 0.3-0.5 mm. 2n = 16.
Home