Perennials; (cespitose, loosely matted); caudex branched (with persistent leaf bases, branches often creeping, sometimes terminating in sterile rosettes); scapose. Stems unbranched, 0.2-0.8 dm, glabrous throughout. Basal leaves rosulate; subsessile; petiole ciliate; blade (thick and somewhat fleshy), obovate to spatulate or oblanceolate, 0.3-1 cm × 1.5-4.5 mm, margins entire, (sometimes sparsely ciliate), surfaces glabrous or pubescent proximal to apex, with simple and fewer, short-stalked, 2-rayed trichomes, 0.2-0.7 mm. Cauline leaves 0. Racemes 8-22-flowered, ebracteate, elongated in fruit; rachis not flexuous, glabrous. Fruiting pedicels horizontal to divaricate-ascending (distinctly decurrent basally), curved upward, 3-7(-10) mm, glabrous. Flowers: sepals oblong, 1.7-3 mm, glabrous or pubescent, (trichomes subapical, simple or 2-rayed); petals bright yellow, oblanceolate to spatulate, 3-5 × 1.7-2.5 mm; anthers oblong, 0.4-0.6 mm. Fruits ovate to ovate-lanceolate or narrowly elliptic-lanceolate, plane, flattened, 3-7(-10) × 2.2-4.5 mm; valves usually glabrous, rarely sparsely puberulent, trichomes simple, 0.03-0.1 mm; ovules 8-12 per ovary; style 0.2-0.8 mm. Seeds oblong, 1.5-1.8 × 0.8-1.1 mm. 2n = 24.
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