Cypripedium macranthum (scientific name: Cypripedium macranthum Sw.): The plant is 25-50 cm tall and has a stubby rhizome. The stem is erect, slightly pubescent or glabrous, with several sheaths at the base and 3-4 leaves above the sheath. The leaves are elliptic or elliptic-ovate. The inflorescence is terminal, with 1 flower, large, purple, red or pink, usually with dark veins, extremely rare white; petals are lanceolate, 4.5-6 cm long, 1.5-2.5 cm wide, apex acuminate, not Torsion, the base of the inner surface is pilose; the labial valve is deep cystic, nearly spherical or elliptical. Capsule narrowly oval, about 4 cm long, glabrous. Flowering period from June to July, fruiting period from August to September.
Born at 400-2400 meters above sea level under forests, forest edges or grass slopes where humus is rich and well-drained. Produced in Heilongjiang, Jilin, Liaoning, Inner Mongolia, Hebei, Shandong and Taiwan, Japan, the Korean Peninsula and Russia are also distributed. This flower is cultivated and has high horticultural value.