Perennials; short-to long-lived; sexual; caudex usually not woody. Stems usually 1 per caudex branch, arising from center of rosette near ground surface, 0.6-3 dm, densely pubescent proximally, trichomes simple and stalked, 2-4-rayed, 0.1-0.4 mm, glabrous or sparsely pubescent distally. Basal leaves: blade narrowly oblanceolate, 1.5-4(-5) mm wide, margins entire, often ciliate along petiole, trichomes (simple), to 0.6 mm, surfaces densely pubescent, trichomes short-stalked, 4-8-rayed, 0.08-0.2 mm. Cauline leaves: 6-17, sometimes concealing stem proximally; blade auricles absent, surfaces of distalmost leaves glabrous or sparsely pubescent. Racemes 4-11-flowered, unbranched. Fruiting pedicels arched, gently recurved, 3-8(-12) mm, glabrous or sparsely pubescent, trichomes appressed, branched. Flowers ascending at anthesis; sepals pubescent; petals white or lavender, 4-6 × 1-1.5 mm, glabrous; pollen ellipsoid. Fruits pendent, not appressed to rachis, not secund, usually straight, edges parallel, (2-)2.5-3.8 cm × 1.5-2.2 mm; valves glabrous; ovules 66-92 per ovary; style 0.3-0.5 mm. Seeds sub-biseriate, 1-1.2 × 0.7-0.9 mm; wing distal, 0.05-0.1 mm wide. 2n = 14.
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