Perennials; short-to long-lived; sexual; caudex usually not woody. Stems usually 2-4 per caudex branch, arising from center of rosette near ground surface, or arising laterally proximal to sterile shoots, 0.6-2 dm, glabrous throughout. Basal leaves: blade oblanceolate, 2-6 mm wide, margins entire, rarely ciliate along petiole, trichomes (simple), 0.5-0.7 mm, surfaces glabrous. Cauline leaves: 5-9, rarely concealing stem proximally; blade auricles 0.7-2.5 mm, surfaces of distalmost leaves glabrous. Racemes 4-12-flowered, usually unbranched. Fruiting pedicels divaricate-ascending to horizontal, straight, 2.5-8 mm, glabrous. Flowers ascending at anthesis; sepals glabrous; petals lavender, 4-5.5 × 1.5-2 mm, glabrous; pollen ellipsoid. Fruits usually divaricate-ascending, rarely slightly descending, usually secund, straight to slightly curved, 1.9-4 cm × 2-3 mm; valves glabrous; ovules 52-72 per ovary; style 0.05-0.2 mm. Seeds biseriate, 1.1-1.4 × 0.8-1 mm; wing continuous, 0.07-0.15 mm wide.
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