Perennials; usually long-lived; sexual; caudex woody, (often with persistent, crowded leaf bases). Stems usually 2-5 per caudex branch, arising from margin of rosette near ground surface, or arising laterally proximal to sterile shoots, 0.2-0.8 dm, pubescent proximally, trichomes simple and short-stalked, 2-or 3-rayed, to 0.4 mm, glabrescent distally. Basal leaves: blade linear, 0.8-1.5 mm wide, margins entire, ciliate, trichomes (simple and spurred), to 0.8 mm, surfaces moderately pubescent, trichomes short-stalked, 2-4-rayed, 0.05-0.4 mm. Cauline leaves: 2-4, not concealing stem; blade auricles absent, surfaces of distalmost leaves pubescent. Racemes 2-5-flowered, unbranched. Fruiting pedicels erect to ascending, straight, 2-7 mm, usually pubescent, rarely glabrous, trichomes subappressed, branched. Flowers erect at anthesis; sepals pubescent; petals white, 3.5-5 × 0.7-1 mm, glabrous; pollen ellipsoid. Fruits erect to ascending, often appressed to rachis, not secund, straight, edges parallel, (1.3-)2-3.3 cm × 4-5 mm; valves glabrous; ovules 8-12 per ovary; style 0.05-0.4 mm. Seeds uniseriate, 3-5 × 2.5-4.5 mm; wing continuous, 0.8-2 mm wide distally.
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