Perennials; long-lived; (often cespitose); sexual; caudex somewhat woody (usually without persistent leaf bases). Stems usually 1 per caudex branch, arising from center of rosette near ground surface, (1.2-)2.5-6 dm, densely pubescent proximally, trichomes short-stalked, 4-10-rayed, 0.1-0.2 mm, sparsely pubescent or glabrous distally. Basal leaves: blade linear to narrowly oblanceolate, 1-4 mm wide, margins entire, ciliate near petiole base, trichomes (simple), to 0.6 mm, surfaces densely pubescent, trichomes short-stalked, 4-10-rayed, 0.1-0.2 mm. Cauline leaves: 5-10, not concealing stem; blade auricles 1-1.5 mm, surfaces of distalmost leaves usually sparsely pubescent. Racemes 10-25-flowered, often sparingly branched. Fruiting pedicels divaricate-ascending to horizontal, often straight proximally, usually strongly recurved or reflexed distally, 4-17 mm, usually pubescent, rarely glabrous, trichomes appressed, branched. Flowers divaricate-ascending at anthesis; sepals pubescent; petals white to lavender, 3.5-6 × 0.7-1 mm, glabrous; pollen ellipsoid. Fruits pendent, not appressed to rachis, not secund, straight or slightly curved, edges parallel, 2.5-5.5 cm × 1.7-2.5 mm; valves glabrous; ovules 34-64 per ovary; style 0.05-0.2 mm. Seeds uniseriate, 1.4-1.8 × 1-1.2 mm; wing continuous, 0.25-0.5 mm wide. 2n = 14.
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