Perennials; caudex branched (with persistent, thickened leaf midveins); scapose. Stems unbranched, (0.05-)0.1-0.8 dm, pubescent throughout, sometimes sparsely so distally, trichomes simple, 0.3-0.7 mm, and 2-4-rayed, 0.05-0.2 mm. Basal leaves (not imbricate); rosulate; petiolate; petiole ciliate, (trichomes simple and 2-rayed, 0.4-1.3 mm); blade oblanceolate, 0.5-1.1 cm × 1.5-4 mm, margins entire, (pubescent as petiole, apex acute to subacute, trichomes simple and/or branched), surfaces pubescent, abaxially with simple trichomes, to 1 mm, and stalked, 2-4-rayed ones, 0.1-0.5 mm, adaxially with simple trichomes, 0.4-1 mm, (sometimes glabrous). Cauline leaves 0. Racemes 2-8-flowered (congested), ebracteate, slightly elongated in fruit; rachis not flexuous, pubescent as stem. Fruiting pedicels divaricate to ascending, straight or slightly curved upward, 1.5-4 mm, pubescent as stem or trichomes branched. Flowers: sepals ovate, 1.8-2.3 mm, pubescent, (trichomes simple with fewer, short-stalked ones); petals pale yellow, narrowly spatulate to oblanceolate, 2.5-3 × 0.8-1.5 mm; anthers ovate, 0.2-0.3 mm. Fruits often obovate, plane, slightly flattened, 5-10 × (3-)3.5-5 mm; valves glabrate or sparsely pubescent, 0.05-0.2 mm; ovules 8-16(-20) per ovary; style 0.05-0.15 mm. Seeds ovoid, 1.1-1.6 × 0.7-1 mm. 2n = 32.
Home