Perennials; usually short-lived; sexual; caudex not woody. Stems usually 1 per caudex branch, arising from center of rosette near ground surface, 0.8-6 dm, sparsely pubescent proximally, trichomes short-stalked and simple, (scattered), 2-rayed, 0.1-0.15 mm, glabrous distally. Basal leaves: blade oblanceolate, 4-10 mm wide, margins usually dentate, not ciliate, surfaces densely pubescent, trichomes short-stalked, 3-or 4-rayed, 0.1-0.2 mm. Cauline leaves: 7-25, concealing stem proximally; blade auricles 1-4 mm, surfaces of distalmost leaves glabrous. Racemes 6-20-flowered, usually unbranched. Fruiting pedicels ascending, usually straight, 5-10 mm, glabrous or pubescent, trichomes spreading, simple. Flowers ascending at anthesis; sepals pubescent; petals dark reddish purple (drying indigo), 7-9 × 1.5-2 mm, glabrous; pollen ellipsoid. Fruits ascending, not appressed to rachis, not secund, curved or straight, edges parallel, (4-)6-12 cm × 1.7-2.2 mm; valves glabrous; ovules 80-100 per ovary; style 0.2-0.5 mm. Seeds uniseriate, 1.2-1.7 × 0.9-1.2 mm; wing lateral and distal, 0.1-0.2 mm wide.
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