Perennials; long-lived; sexual; caudex woody. Stems usually 1 per caudex branch, arising from center of leaf tufts, elevated above ground surface on woody base, (1.5-) 3-7.5 dm, densely pubescent proximally, trichomes short-stalked, usually 4-7-rayed, 0.1-0.3 mm, similarly pubescent distally. Basal leaves: blade linear to linear-oblanceolate, 1-3 mm wide, margins entire, not ciliate, surfaces densely pubescent, trichomes short-stalked, 4-9-rayed, 0.1-0.3 mm. Cauline leaves: 10-30, often concealing stem proximally; blade auricles absent or, rarely, to 0.5 mm, surfaces of distalmost leaves pubescent. Racemes 8-25-flowered, usually unbranched. Fruiting pedicels reflexed, abruptly recurved at base, otherwise straight, 8-16 mm, pubescent, trichomes appressed, branched. Flowers descending at anthesis; sepals pubescent; petals usually purple, rarely white, 9-16 × 2-4(-5) mm, sparsely pubescent or glabrous (trichomes scattered abaxially); pollen ellipsoid. Fruits strongly reflexed, often appressed to rachis, sometimes somewhat secund, straight, edges parallel, 3.3-8 cm × 2.5-4 mm; valves pubescent throughout; ovules 68-106 per ovary; style 0.1-0.3 mm. Seeds biseriate, 1.7-2.8 × 1.5-2.2 mm; wing continuous, 0.25-0.65 mm wide.
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