草甸碎米荠 cao dian sui mi ji

Herbs perennial, (8-)15-55(-80) cm tall, glabrous or rarely sparsely pilose basally. Rhizomes tuberous, to 5 mm in diam., without stolons. Stems erect, simple, 2-12(-18)-leaved. Rhizomal leaves to 30 cm; petiole (1-)2-7(-10) cm; terminal leaflet orbicular or broadly obovate, 0.3-2 cm in diam., with a petiolule to 1.5 cm, base rounded, rarely subreniform or cuneate, margin repand, apex rounded; lateral leaflets (0 or)2-8(-15) on each side of rachis, about as large as or smaller than terminal leaflet, orbicular, ovate, or obovate, petiolulate or sessile, margin crenate or repand. Cauline leaves including petiole 2-17 cm, pinnatisect, glabrous; petiole base not auriculate; terminal lobe linear, oblong, ovate, or lanceolate, 1-2.5(-3.5) cm × 5-8(-10) mm, petiolulate or sessile; lateral lobes 4-7(-13) on each side of rachis, similar to terminal lobe, base petiolulate or sessile and decurrent, margin entire or rarely dentate. Fruiting pedicels erect-ascending or subdivaricate, (0.5-)1.2-2.5(-3) cm, slender. Sepals oblong or ovate, (2.5-)3-5(-6) × 1-2 mm, erect or spreading, base saccate, margin membranous. Petals purple or lilac, rarely white, obovate, (0.6-)0.8-1.5(-1.8) cm × 3-7.5(-10) mm, clawed, apex rounded or emarginate. Median filament pairs 5-10 mm, lateral pair 3-6 mm; anthers narrowly oblong, (0.8-)1.2-2 mm. Ovules 20-30 per ovary. Fruit linear, (1.6-)2.5-4.5(-5) cm × (1.2-)1.5-2.3 mm; valves glabrous; style (0.5-)1-2.2(-2.7) mm, stout. Seeds light brown, oblong, 1.2-1.8(-2) × 1-1.4 mm. Fl. May-Jul, fr. Jun-Aug. 2n = 16, 24, 28-34, 38-44, 48, 56, 96.

Moist grasslands, river or streamsides. Heilongjiang, Nei Mongol, Xinjiang, W Xizang [Japan, Kazakhstan, Korea, Mongolia, Russia; Europe, North America].