Biennials or perennials; short-lived; apomictic; caudex present or absent. Stems usually 1 per caudex branch, arising from center of rosette near ground surface, (1.5-)3-9 dm, glabrous or pubescent proximally, trichomes sessile, 2-4-rayed (some simple), to 0.7 mm, glabrous distally. Basal leaves: blade oblanceolate, 2-10 mm wide, margins usually entire, rarely denticulate, ciliate along petiole, trichomes (simple), to 0.8 mm, surfaces sparsely to densely pubescent, trichomes sessile, 2-6-rayed, 0.1-0.4 mm. Cauline leaves: (10-)15-56, concealing stem proximally; blade auricles 1-5 mm, surfaces of distalmost leaves glabrous. Racemes 12-40(-65)-flowered, usually unbranched. Fruiting pedicels divaricate-ascending to horizontal, straight, 5-12 mm, glabrous. Flowers divaricate-ascending at anthesis; sepals glabrous or with scattered trichomes; petals usually purple, rarely lavender, 6-9 × 1.5-3 mm, glabrous; pollen spheroid. Fruits divaricate-ascending to horizontal, not appressed to rachis, not secund, straight, edges parallel, (4.5-)5.5-11 cm × 1.7-2.5 mm; valves glabrous; ovules 114-142 per ovary; style 0.05-0.2 mm. Seeds uniseriate to sub-biseriate, 1.4-2 × 1-1.5 mm; wing continuous, 0.1-0.2 mm wide. 2n = 21.
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