Perennials; long-lived; sexual; caudex woody. Stems usually 1 per caudex branch, arising from center of leaf tuft, above ground surface on woody base, 2-5.5 dm, densely pubescent proximally, trichomes short-stalked, 4-7-rayed, 0.1-0.4 mm, similarly pubescent distally. Basal leaves: blade linear to linear-oblanceolate, 2-3(-4) mm wide, margins entire, sometimes ciliate near petiole base, trichomes (simple or 2-rayed), to 0.8 mm, surfaces densely pubescent, trichomes short-stalked, 4-8-rayed, 0.1-0.3 mm. Cauline leaves: 7-18, concealing stem proximally; blade auricles absent, surfaces of distalmost leaves densely pubescent. Racemes 6-26-flowered, usually unbranched. Fruiting pedicels horizontal to descending, usually recurved, 5-10(-20) mm, pubescent, trichomes appressed, branched. Flowers divaricate at anthesis; sepals pubescent; petals white to pale lavender, 8-18 × 2.5-4.4(-5.5) mm, glabrous; pollen ellipsoid. Fruits divaricate-descending to reflexed, usually not appressed to rachis, rarely somewhat secund, straight, edges parallel, 4.3-7 cm × 1.6-3 mm; valves pubescent throughout; ovules 72-98 per ovary; style ca. 0.1 mm. Seeds biseriate, 1.2-1.6 × 1-1.2 mm; wing continuous, 0.1-0.2 mm wide. 2n = 14.
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