曙南芥 shu nan jie

Draba multiceps Kitagawa.

Herbs perennial, 5-15 cm tall, canescent throughout, sometimes pulvinate, with branched caudex. Stems erect, few branched above middle. Basal leaves densely rosulate, numerous, persistent; petiole obscurely differentiated from blade; leaf blade linear, (0.4-)1-2 cm × 0.5-1.5 mm, attenuate into a petiolelike base, apex acute. Cauline leaves linear, erect, few, similar to basal. Fruiting pedicels, divaricate or ascending, slender, (2.5-)4-8(-10) mm. Sepals narrowly oblong, 1.5-2.5(-3) × 0.7-1.3 mm, base subsaccate, margin membranous. Petals white, pink, or purple, 4-5(-6) × 2-3(-3.5) mm; claw 1.5-2 mm. Filaments 1.5-2.5 mm; anthers narrowly ovate, 0.5-0.6 mm. Ovules 6-12 per ovary. Fruit linear, (0.5-)0.6-1.5(-2) cm × 1-1.5 mm, strongly torulose; replum constricted between seeds; style slender, (1-)1.5-2.7 mm. Seeds brown, suborbicular, ca. 1 mm in diam., wingless, flattened. Fl. May-Jul. 2n = 32.

Rocky slopes, crevices, alkaline grasslands. Nei Mongol [Mongolia, Russia].