Biennials or perennials; short-lived; apomictic; caudex present or absent. Stems usually 1 per caudex branch, arising from center of rosette near ground surface, 2-7 dm, sparsely to densely pubescent proximally, trichomes subsessile, sub-malpighiaceous, 0.3-0.6 mm, glabrous distally. Basal leaves: blade oblanceolate, 3-7 mm wide, margins entire, ciliate proximally, trichomes (simple), to 0.8 mm, surfaces sparsely to densely pubescent, trichomes subsessile, 2-5-rayed, 0.2-0.55 mm. Cauline leaves: 7-17, often concealing stem proximally; blade auricles 2-5 mm, surfaces of distalmost leaves sparsely pubescent or glabrous. Racemes 19-39-flowered, usually unbranched. Fruiting pedicels reflexed, recurved proximally, 5-13 mm, glabrous. Flowers divaricate to pendent at anthesis; sepals pubescent; petals white to pale lavender, 6-7 × 1.2-2 mm, glabrous; pollen spheroid. Fruits reflexed, rarely appressed to rachis, not secund, straight, edges parallel, 4-7(-8.5) cm × 2-2.3 mm; valves glabrous; ovules 88-104 per ovary; style 0.3-0.7 mm. Seeds sub-biseriate, 2-2.5 × 1.1-1.5 mm; wing continuous, 0.15-0.25 mm wide.
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