Description from
Flora of China
Convallaria trifolia Linnaeus, Sp. Pl. 1: 316. 1753; Asteranthemum trifolium (Linnaeus) Kunth; Smilacina trifolia (Linnaeus) Desfontaines; Tovaria trifolia (Linnaeus) Necker ex Baker; Vagnera trifolia (Linnaeus) Morong.
Plants 10--20 cm tall. Rhizome 2--2.5 mm thick, slender. Stem glabrous. Leaves usually 3; petiole short, ± clasping stem; leaf blade oblong or narrowly elliptic, 6--13 × 1.5--3.5 cm, papery, glabrous. Inflorescence a raceme, (2--)3.5--6 cm, 4--7-flowered, glabrous. Flowers solitary; pedicel 4--6 mm. Perianth white; segments slightly connate at base, oblong, 2--3 × 1.5--2 mm. Filaments filiform, 2--2.5 mm; anthers small. Style ca. 1 mm, subequaling ovary; stigma slightly 3-lobed. Fl. Jun, fr. Aug. 2 n = 36.
Forests; 400--700 m. Heilongjiang, Jilin, ?Nei Mongol [N Korea, Russia; North America].