Perennials; long-lived; (ces-pitose); sexual; caudex woody (thickly covered by persistent, crowded leaf bases). Stems usually 1 per caudex branch, arising from center of rosette near ground surface, 0.6-2.3 dm, glabrous throughout. Basal leaves: blade oblanceolate, 3.5-14 mm wide, margins usually entire, rarely slightly dentate, not ciliate, surfaces glabrous. Cauline leaves: 3-10, not concealing stem; blade auricles absent, glabrous. Racemes 4-24-flowered, usually unbranched. Fruiting pedicels ascending, straight, 3-18 mm, glabrous. Flowers ascending at anthesis; sepals glabrous; petals white to lavender, 6-10 × 2.5-4 mm, glabrous; pollen ellipsoid. Fruits ascending to divaricate-ascending, not appressed to rachis, not secund, straight to slightly curved, edges parallel, 2.5-7 cm × 1.5-2.5 mm; valves glabrous; ovules 28-50 per ovary; style 0.1-0.8 mm. Seeds uniseriate, 1.8-2.2 × 0.8-1.7 mm; wing distal or continuous, 0.1-0.5 mm wide.
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