1	"Prostrate creeper with kidney-shaped leaves; ovary 2-lobed, with the 2 styles between the lobes"	Dichondra
1	"Mostly upright or climbing plants; ovary entire, style(s) terminal"	2
2	"Styles 2"	Evolvulus
2	"Styles 1"	3
3	"Stigmas 1–2, spherical or bilobed"	Ipomoea
3	"Stigmas 2, lobes oblong or linear"	4
4	"Bracts large,more or less enclosing the calyx"	Calystegia
4	"Bracts small, some distance from the calyx"	Convolvulus