Perennials; (loosely cespitose); caudex branched (with persistent leaf bases, branches sometimes terminating in sterile rosettes); scapose. Stems unbranched, (0.15-)0.3-1.3(-1.6) dm, pubescent proximally, glabrous or nearly so distally, trichomes 2-or 3-rayed and simple, 0.1-1 mm. Basal leaves rosulate; subsessile; blade oblanceolate to obovate, 0.4-1.6(-2) cm × 2-4(-6) mm, margins entire, (not ciliate), surfaces pubescent with stalked, 2-4-rayed trichomes, 0.2-0.9 mm, rarely adaxially with simple trichomes, (midvein obscure abaxially). Cauline leaves 0. Racemes 3-20(-27)-flowered, ebracteate, slightly to considerably elongated in fruit; rachis straight or flexuous, usually glabrous, rarely pubescent, trichomes simple and 2-4-rayed. Fruiting pedicels divaricate to horizontal, straight or curved upward (expanded basally or not), 4-9(-13) mm, glabrous or pubescent, trichomes simple and 2-4-rayed. Flowers: sepals broadly ovate, 1.8-2.5 mm, glabrous or pubescent, (trichomes simple and branched); petals yellow, spatulate, 3.5-5.5 × 1.5-2.2 mm; anthers ovate, 0.4-0.5 mm. Fruits lanceolate to ellipsoid or ovoid, plane (not curved), inflated or slightly flattened, (4.2-)5.3-10(-13) × 2.5-4.5(-5.5) mm; valves glabrous or pubescent, trichomes simple and short-stalked, 2-rayed, 0.05-0.3 mm; ovules 8-16 per ovary; style 0.3-1(-1.2) mm. Seeds oblong, 1.2-1.6 × 0.7-0.9 mm. 2n = 20.
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