Perennials; short-to long-lived; apomictic or sexual; caudex usually woody. Stems usually 2-5 per caudex branch, arising laterally proximal to sterile shoots, often elevated on woody base, 1.2-4(-5) dm, densely pubescent proximally, trichomes short-stalked, 4-7-rayed, 0.1-0.3 mm, sparsely pubescent or glabrous distally. Basal leaves: blade narrowly oblanceolate, 2-5(-8) mm wide, margins entire, rarely ciliate near petiole base, trichomes (simple or spurred), to 1 mm, surfaces densely pubescent, trichomes short-stalked, 3-7-rayed, 0.05-0.3 mm. Cauline leaves: 4-12(-17), rarely concealing stem proximally; blade auricles 0.5-2 mm, surfaces of distalmost leaves sparsely pubescent. Racemes 6-15(-25)-flowered, usually unbranched. Fruiting pedicels slightly descending, gently recurved, 5-16 mm, glabrous or sparsely pubescent, trichomes appressed, branched. Flowers divaricate-ascending at anthesis; sepals pubescent; petals whitish (often aging pale lavender), 5-7 × 1-1.5 mm, glabrous; pollen ellipsoid or spheroid. Fruits widely pendent, not appressed to rachis, not secund, usually curved, edges parallel, 2.5-5.6 cm × 1.2-2 mm; valves glabrous; ovules 48-74 per ovary; style 0.1-0.2 mm. Seeds uniseriate, 1-1.3 × 0.8-1 mm; wing often continuous, 0.1-0.15 mm wide. 2n = 14.
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