Identification key for Dioscorea communis, D. cretica, D. edulis and D. orientalis
1a. Flowers sessile, solitary; perigonium white or violet in male inflorescences; leaf pedicel up to 1.6 cm …. D. orientalis
1b. Flowers pedicellate in fascicles (2–4 flowers each); perigonium whitish-greenish or violet; leaf pedicel usually longer than leaf …. 2
2a. Leaves cordate-sagittate; perigonium violet; Macaronesia ….