Herbs perennial or biennial, (25-)40-100(-140) cm tall, often densely glandular especially above, hirsute with simple trichomes to 3 mm. Stems erect, simple basally, often branched above, glandular and often also subsetose. Basal leaves withered by flowering. Middle and upper cauline leaves narrowly to broadly lanceolate, (3-)5-10(-16) × (0.5-)1-3.5(-5.5) cm, sessile or subsessile, glandular and with simple trichomes, base cuneate, margin denticulate or subentire, apex acute or acuminate. Fruiting pedicels divaricate or ascending, 0.7-2.5(-3.2) cm, glandular. Sepals narrowly oblong, 5.5-7.5(-10) × 1.5-2 mm. Petals deep purple, lavender, or white, narrowly to broadly obovate, 1.5-2(-2.5) cm × 5-10 mm, apex rounded; claw 7-10 mm. Filaments 3-5.5(-6.5) mm; anthers linear, 2.5-4 mm. Fruit terete, (3-)4-10(-13) cm × 1.5-2 mm; valves sparsely to densely glandular, constricted between seeds. Seeds oblong, (1.5-)2-2.7(-3) × 1-1.3 mm. Fl. and fr. May-Sep. 2n = 14.
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