1	"Petals 4"	2
1	"Petals 5-6"	3
2	"Leaves entire to more or less deeply lobed; inflorescences with tendrils; disk with vertical furrows"	"Ampelocissus {Ampelocissus africana}"
2	"Leaves with 3 leaflets; inflorecences without tendrils; disk without furrows"	"Rhoicissus {Rhoicissus revoilii}"
3	"Flower-buds ovoid or conical, not constricted near the middle; nectary-disk annual; leaves simple"	Cissus
3	"Flower buds cylindrical or flask-shaped, constricted at or near the middle; disk divided into 4 separate glands; leaves with (1)3-7 leaflets"	Cyphostemma