Perennials; (densely pulvinate); caudex branched (with persistent, thickened petioles, branches compact); not scapose. Stems unbranched, 0.3-1.3(-1.7) dm, usually glabrous throughout or sparsely pubescent proximally, rarely sparsely pubescent distally, trichomes simple and 2-rayed, 0.1-0.7 mm. Basal leaves (not imbricate); rosulate; petiolate; petiole ciliate, (trichomes usually simple, rarely 2-rayed, not setiform); blade narrowly oblanceolate to linear-lanceolate, (strongly differentiated into blade and petiole), (1.2-)1.8-6(-8.5) cm × 1-5(-7) mm, margins entire or sparsely denticulate, (ciliate as petiole; midvein not prominent), surfaces glabrous or pubescent, usually with simple trichomes 0.1-0.8 mm, rarely 2-rayed. Cauline leaves 1-8; sessile; blade lanceolate to narrowly oblong, margins usually entire, surfaces pubescent as basal. Racemes 5-17(-23)-flowered, ebracteate, elongated in fruit; rachis not flexuous, usually glabrous, rarely pubescent, trichomes simple and 2-rayed, (non-crisped). Fruiting pedicels divaricate-ascending or ascending, straight, 3-9(-13) mm, usually glabrous, rarely sparsely pubescent, trichomes simple. Flowers: sepals ovate, 2-2.5 mm, pubescent, (trichomes simple); petals yellow, oblanceolate, 4-6 × 1.5-2 mm; anthers oblong, 0.6-0.8 mm. Fruits linear-elliptic to elliptic, twisted or plane, flattened, 5-10(-13) × 1.5-2.5 mm; valves usually glabrous, rarely puberulent, trichomes simple, 0.05-0.1 mm; ovules 12-24 per ovary; style 0.7-1.4(-1.8) mm. Seeds ovoid, 1-1.2 × 0.7-0.8 mm.
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