Uvularia viridescens Maximowicz, Prim. Fl. Amur. 273. 1859; Disporum smilacinum A. Gray var. viridescens (Maximowicz) Maximowicz; Prosartes viridescens (Maximowicz) Regel.

Rhizome short, usually with long, creeping stolon; roots densely tufted. Stem often branched distally, sometimes simple, 30--80 cm. Petiole very short; leaf blade ellitpic to ovate-oblong, 5--12 × 2--5 cm, abaxially slightly scabrous on veins, cross veins indistinct, margin minutely scabrous. Inflorescences terminal, 1- or 2-flowered; pedicels 1.5--2.5 cm. Flowers widely opening. Tepals greenish white, oblong-lanceolate to lanceolate, (1.2--)1.5--2 cm × 3--4 mm, 7-veined, base slightly saccate, apex long attenuate. Stamens 4.5--7 mm, included; filaments slightly dilated proximally, 3--4 mm; anthers 2--3 mm. Ovary globose, 2.5--3.5 mm. Style 3--4 mm. Berries black, globose, ca. 1 cm in diam., 2- or 3-seeded. Seeds red-brown, ca. 4 mm in diam. Fl. May--Jun, fr. Jul--Oct. 2 n = 16.

Forests, grassy slopes; near sea level to 600 m. Heilongjiang, Jilin, Liaoning [Japan, Korea, Russia (Far East)].