Biennials or perennials; short-lived; sexual; caudex present or absent. Stems usually 1 per caudex branch, arising from center of rosette near ground surface, 1.5-7(-10.5) dm, densely pubescent proximally, trichomes short-stalked, 2-8-rayed, 0.1-0.2 mm, sparsely pubescent distally. Basal leaves: blade oblanceolate, 2-7 mm wide, margins entire or shallowly dentate, sometimes ciliate at petiole base, surfaces densely pubescent, trichomes short-stalked, 5-10-rayed, 0.05-0.2 mm. Cauline leaves: 15-40, concealing stem proximally; blade auricles 0.5-2.5 mm or, rarely, absent, surfaces of distalmost leaves pubescent. Racemes 15-80(-140)-flowered, usually unbranched. Fruiting pedicels reflexed, abruptly recurved at base, otherwise usually straight, 7-12 (-18) mm, pubescent, trichomes appressed, branched. Flowers pendent at anthesis; sepals pubescent; petals white to lavender, 4-8 × 0.8-2.2 mm, glabrous; pollen ellipsoid. Fruits strongly reflexed, usually appressed to rachis, sometimes somewhat secund, straight, edges parallel, 3.5-9 cm × 0.9-1.8 mm; valves glabrous or sparsely pubescent throughout; ovules 60-116 per ovary; style 0.5-2 mm. Seeds uniseriate, 1-1.4 × 0.9-1.2 mm; wing continuous, to 0.1 mm wide. 2n = 14.
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