Perennials; usually short-lived; apomictic; caudex not woody. Stems usually 1 per caudex branch, arising from center of rosette near ground surface, 1-4.5 dm, glabrous throughout. Basal leaves: blade oblanceolate, 1.5-6 mm wide, margins entire, ciliate at petiole base, trichomes to 0.8 mm, surfaces sparsely pubescent, trichomes sessile, malpighiaceous (usually at margin) and 3-or 4-rayed, 0.15-0.4 mm. Cauline leaves: 5-17, often concealing stem proximally; blade auricles 1-3 mm, surfaces of distalmost leaves glabrous. Racemes 10-25-flowered, unbranched. Fruiting pedicels erect, straight, 5-10 mm, glabrous. Flowers erect at anthesis; sepals glabrous; petals purple, 6-9 × 1.5-2.5 mm, glabrous; pollen spheroid. Fruits erect, appressed to rachis, not secund, straight, edges parallel, 3.5-6.5 cm × 1.8-2.5 mm; valves glabrous; ovules 64-134 per ovary; style 0-0.2 mm. Seeds biseriate to sub-biseriate, 1.8-2.2 × 1-1.8 mm; wing continuous, 0.2-0.5 mm wide.
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