1	"Stamens as many as petals; leaves connate basally"	Crassula
1	"Stamens twice as many as petals; leaves not connate basally"	2
2	"Petals free or fused only at base; leaves alternate"	3
2	"Petals fused into a tube for half their length; leaves opposite or whorled"	4
3	"Leaf-blades laminar, in dense rosettes; petals connate basally (Graptopetalum paraguayense)"	Graptopetalum
3	"Leaf-blades terete or subterete; petals ± free"	Sedum
4	"Flowers erect or spreading; filaments inserted near or above middle of corolla tube; plants not viviparous (Kalanchoe lateritia)"	Kalanchoe
4	"Flowers pendulous; filaments fused to corolla tube in lower third or basally; plants viviparous with plantlets on leaf margins and inflorescences"	Bryophyllum