Perennials; (cespitose); caudex branched (with persistent leaves or leaf remains, branches sometimes terminating in sterile rosettes); scapose. Stems unbranched, (0.05-)0.2-0.8 (-1.5) dm, pubescent throughout, trichomes simple and 2-rayed, 0.4-1 mm, with 3-5-rayed ones, 0.05-0.4 mm, (sometimes trichomes mostly simple). Basal leaves rosulate; petiolate; petiole base and margin ciliate, (trichomes often course, simple, 0.4-1.3 mm); blade oblanceolate to obovate, 0.6-1.8 cm × 1.5-5 mm, margins entire, surfaces pubescent, abaxially with stalked, 2-6-rayed trichomes, 0.2-0.6 mm, adaxially with primarily simple and stalked, 2-rayed trichomes, to 1.1 mm, with 3-5-rayed ones, 0.2-0.4 mm. Cauline leaves 0. Racemes 2-9(-12)-flowered, ebracteate, (corymbose), slightly elongated in fruit; rachis not flexuous, pubescent as stem. Fruiting pedicels divaricate-ascending, straight or slightly curved upward, 4-11(-16) mm, pubescent, trichomes simple and 2-4-rayed. Flowers: sepals (grayish green), broadly ovate, 2.2-3 mm, pubescent, (trichomes simple, to 1 mm, sometimes with stalked, smaller, 2-4-rayed ones); petals (broadly patent), yellow, obovate, 4-6 × 3-5 mm; anthers ovate, 0.3-0.4 mm. Fruits oblong or ovate, plane, flattened, 6-12 × 3.5-5.5 mm; valves pubescent or puberulent, trichomes simple, 0.1-0.4 mm, (sometimes with short-stalked, 2-or 3-rayed ones); ovules 12-24 per ovary; style 0.6-1 mm (stigma distinctly wider than style). Seeds (brown), ovoid, 1-1.3 × 0.6-0.9 mm. 2n = 128, 144.
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