Biennials or perennials; short-lived; apomictic; caudex present or absent. Stems usually 1 per caudex branch, arising from center of rosette near ground surface, 2.6-7.4(-10.2) dm, densely pubescent proximally, trichomes short-stalked, 4-8-rayed, 0.1-0.5 mm, sometimes mixed with 2-or 3-rayed ones, to 1 mm, usually sparsely pubescent distally, rarely glabrous. Basal leaves: blade oblanceolate, 3-8(-10) mm wide, margins entire or shallowly dentate, ciliate near petiole base, trichomes (simple), to 1 mm, surfaces moderately to densely pubescent, trichomes short-stalked, 4-8-rayed, 0.15-0.4 mm. Cauline leaves: 22-72, concealing stem proximally; blade auricles 1-4 mm, surfaces of distalmost leaves sparsely pubescent or glabrous. Racemes 25-112-flowered, usually unbranched. Fruiting pedicels divaricate-descending, straight or gently curved, (10-) 15-28 mm, usually sparsely pubescent, rarely glabrous, trichomes appressed, branched. Flowers divaricate-ascending at anthesis; sepals pubescent; petals white to lavender, 6-8 × 1-1.5 mm, glabrous; pollen spheroid. Fruits pendent, not appressed to rachis, not secund, straight or gently curved, edges parallel, 4.5-6.5 cm × 1.5-3 mm; valves glabrous; ovules 100-136 per ovary; style to 0.2 mm. Seeds biseriate or sub-biseriate, 1-1.4 × 0.9-1 mm; wing continuous, 0.05-0.15 mm.
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