Perennials; usually long-lived; (cespitose); sexual; caudex often woody. Stems usually 2–6 per caudex branch, arising from margin of rosette near ground surface, 0.8–2(–2.5) dm, densely pubescent proximally, trichomes short-stalked, 2–4-rayed, 0.08–0.3 mm, mixed with fewer simple ones, usually sparsely pubescent distally, rarely glabrous. Basal leaves: blade linear-oblanceolate, 1–3(–4) mm wide, margins entire, ciliate proximally, trichomes to 0.8 mm, surfaces densely pubescent, trichomes short-stalked, 3–6-rayed, 0.08–0.3 mm. Cauline leaves: 3–9, not concealing stem; blade auricles 0.2–1 mm, surfaces of distalmost leaves glabrous or sparsely pubescent. Racemes 7–15-flowered, usually unbranched. Fruiting pedicels divaricate, straight or slightly curved, 4–7 mm, glabrous or sparsely pubescent, trichomes appressed, branched. Flowers divaricate-ascending at anthesis; sepals pubescent; petals white or lavender, 4–6 × 1–2 mm, glabrous; pollen ellipsoid. Fruits horizontal to divaricate-descending, not appressed to rachis, not secund, straight to slightly curved, edges parallel, 2.5–4 cm × 1–1.5 mm; valves glabrous; ovules 36–54 per ovary; style 0.1–0.2 mm. Seeds uniseriate, 1–1.2 × 0.8–1 mm; wing continuous, 0.1–0.15 mm wide. 2n = 14.
