Paris quadrifolia var. angustiovata D. Z. Ma & H. L. Liu.

Plants 25--40 cm tall. Rhizome creeping, slender, 2--5 mm thick. Leaves usually 4 or 5, subsessile; leaf blade broadly obovate or ovate, 5--10 × 2.5--5 cm, base subcuneate. Peduncle 7--10 cm. Outer tepals 4, spreading horizontally, green, ovate-lanceolate, 2--3 cm × 5--9 mm; inner ones yellow-green, filiform-linear, 1.5--3 cm × 1--2 mm. Stamens 8; filaments 3--5 mm; anthers 3--6 mm; free portion of connective 4--5 mm. Ovary purple-red, globose, 4--8 mm in diam., 4(or 5)-loculed. Stigma lobes 4 or 5, slender. Berry globose, many seeded. Seeds without aril. Fl. Jul, fr. Aug. 2 n = 15, 20, 25, 30.

Forests, thickets, moist places. N Heilongjiang, N Xinjiang [Mongolia, Russia (Siberia); Europe].