Perennials; long-lived; sexual; caudex woody. Stems usually 1 per caudex branch, arising from center of rosette, elevated on woody base above or near ground surface, 0.6-2.8(-3.5) dm, densely pubescent proximally, trichomes short-stalked, 2-5-rayed, 0.1-0.3 mm, glabrous or sparsely pubescent distally. Basal leaves: blade narrowly oblanceolate, 3-7(-10) mm wide, margins entire, ciliate near petiole base, trichomes (simple or spurred), to 1 mm, surfaces densely pubescent, trichomes short-stalked, 2-4 (or 5)-rayed 0.1-0.3 mm. Cauline leaves: 3-7(-12), not concealing stem; blade auricles absent, surfaces of distalmost leaves glabrous or sparsely pubescent. Racemes 2-7-flowered, unbranched. Fruiting pedicels ascending, straight, 3-13 mm, glabrous or sparsely pubescent, trichomes appressed, branched. Flowers ascending at anthesis; sepals pubescent; petals creamy white to purplish, 4-6 × 1-2 mm, sparsely pubescent (often some trichomes abaxially); pollen ellipsoid. Fruits ascending, not appressed to rachis, not secund, straight to slightly curved, edges undulate (not parallel), (2.5-)4-8.5 cm × 3-5.5 mm; valves glabrous; ovules 16-44 per ovary; style 0.05-1 mm. Seeds uniseriate, 3-6(-8) × 2-3.5 mm; wing continuous, 0.8-2.5 mm wide. 2n = 14.
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