Herbs annual or biennial, 15-40 cm tall. Stems branched basally and above. Basal leaves not rosulate; petiole 1-2 cm; leaf blade oblanceolate, 2-6 × 0.8-2 cm, margin dentate, not ciliate, apex obtuse or acute. Middle cauline leaves sessile, auriculate, linear-oblong or narrowly lanceolate, 0.8-4.5 cm × 1-7(-10) mm, widest at middle, margin often entire, not ciliate. Fruiting pedicels stout, (4-)6-10(-12) mm, reflexed, forming a straight line with fruit, articulate at base. Sepals oblong, 1.2-1.6 × ca. 0.5 mm, glabrous or sparsely pubescent subapically with straight trichomes, base of lateral pair slightly saccate. Petals pale purple, narrowly oblanceolate, 2-3 × 0.4-0.6 mm. Filaments 1-1.5 mm; anthers ovate, 0.4-0.5 mm. Fruit narrowly oblong or lanceolate, (6-)7-12 × 1.2-1.8 mm, pointed downward, strongly 4-angled, constricted at middle when more than 1-seeded, cuneate at base, attenuate into a beaklike apex (2-)2.5-3 mm. Seeds yellow, oblong, 1.8-2.6 × 0.7-1 mm. Fl. May-Jun, fr. Jun-Jul.
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