Perennials; (sometimes cespitose); caudex simple or branched; not scapose. Stems branched or unbranched, (0.4-)1-3.5(-4.7) dm, often pubescent throughout (sometimes sparsely so distally), sometimes glabrous, trichomes simple and 2-rayed, (non-crisped), 0.2-1 mm, or subsessile, stellate-pectinate, and 3-8-rayed, 0.1-0.3 mm. Basal leaves rosulate; petiolate; petiole ciliate, (trichomes simple, 0.1-0.8 mm); blade oblanceolate to spatulate or linear-oblanceolate, (0.6-)1-3.5(-5) cm × 2-8(-10) mm, margins dentate or denticulate, (pubescent as petiole), surfaces pubescent with non-crisped, minutely stalked, 4-8(-12)-rayed, stellate-pectinate trichomes, 0.15-0.6 mm, (midvein obscure abaxially), adaxially sometimes also with simple trichomes, or glabrous. Cauline leaves 2-17(-25); sessile; blade ovate to oblong, margins dentate to subentire, surfaces often pubescent as basal, or predominantly with simple trichomes adaxially. Racemes (5-)8-26(-34)-flowered, ebracteate or proximalmost 1 or 2 flowers bracteate, elongated in fruit; rachis not flexuous, usually glabrous, rarely pubescent as stem. Fruiting pedicels divaricate-ascending to suberect, straight, (1-)3-10(-16) mm, glabrous or pubescent as stem. Flowers: sepals oblong, 2-3.5 mm, pubescent, (trichomes simple and short-stalked, 2-4-rayed); petals white, broadly obovate, 4-5.5 × 1.5-3 mm; anthers ovate, 0.3-0.5 mm. Fruits oblong to ovate or ovoid to lanceolate or linear-lanceolate, usually plane, rarely slightly twisted, flattened or inflated, (3-) 5-12(-16) × 2-3.5 mm; valves glabrous or pubescent, trichomes simple or 2-4-rayed, 0.05-0.2(-0.4) mm; ovules (20-)24-36 per ovary; style 0.05-0.2(-0.5) mm. Seeds oblong, 0.9-1.1 × 0.5-0.7 mm. 2n = 64, 80.
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