Perennials; long-lived; (ces-pitose); sexual; caudex woody. Stems usually 1 per caudex branch, arising from center of rosette near ground surface, 1-2.5 dm, densely pubescent proximally, trichomes short-stalked, 2-5-rayed, 0.2-0.6 mm, and sparse, simple ones to 1 mm, glabrous distally. Basal leaves: blade narrowly oblanceolate, 1.5-3 mm wide, margins entire, ciliate along petiole, trichomes (simple), to 1 mm, surfaces densely pubescent, trichomes short-stalked, 4-8-rayed, 0.1-0.2 mm. Cauline leaves: 3-5, not concealing stem; blade auricles 0.5-1 mm, surfaces of distalmost leaves pubescent. Racemes 10-22-flowered, unbranched. Fruiting pedicels divaricate-ascending, straight, 4-8 mm, sparsely pubescent, trichomes appressed, branched. Flowers ascending at anthesis; sepals pubescent; petals white, 3-4 × 0.5-0.8 mm, glabrous; pollen ellipsoid. Fruits divaricate-ascending, not appressed to rachis, not secund, straight, edges parallel, 3-4 cm × 1.2-1.5 mm; valves glabrous; ovules 46-52 per ovary; style ca. 0.1 mm. Seeds uniseriate, 1-1.1 × 0.9-1 mm; wing continuous, ca. 0.1 mm wide.
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