Perennials; long-lived; sexual; caudex woody (often with persistent, crowded leaf bases). Stems usually 1 per caudex branch, arising from center of rosette near ground surface, 1-4(-5) dm, densely pubescent proximally, trichomes short-stalked, 2-6-rayed, 0.1-0.2 mm, sparsely pubescent distally. Basal leaves: blade narrowly oblanceolate, 1-4(-5) mm wide, margins prominently dentate to subpinnatifid (leaf margins of sterile shoots often entire), ciliate near petiole base, trichomes (simple or 2-rayed), 0.4-0.6 mm, surfaces densely pubescent, trichomes short-stalked, (2-)4-9-rayed, 0.05-0.2 mm. Cauline leaves: (10-) 20-60, often concealing stem throughout; blade auricles 0.5-3 mm, surfaces of distalmost leaves moderately to sparsely pubescent. Racemes 8-30-flowered, usually unbranched. Fruiting pedicels reflexed, strongly recurved, 5-15 mm, pubescent, trichomes appressed, branched. Flowers divaricate-ascending to pendent at anthesis; sepals pubescent; petals usually purple, rarely lavender, 9-14 × 1.5-3 mm, glabrous; pollen ellipsoid. Fruits pendent, not appressed to rachis, not secund, straight to slightly curved, edges parallel, (3.5-)5-8 cm × (1.6-)2-3 mm; valves pubescent throughout; ovules 24-42 per ovary; style 0.5-1 mm. Seeds uniseriate, 2.5-3.5 × 1.5-2.2 mm; wing continuous or at both ends, 0.4-0.8 mm wide. 2n = 14.
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