1	"Twining parasites with red or yellowish filiform stems; leaves minute, scale-like"	Cuscuta
1	"Green or grey leafy non-parasitic plants; stems ascending, creeping, climbing or trailing"	2
2	"Sepals joined, tubular-campanulate, tube longer than the lobes"	Wilsonia
2	"Sepals free or joined at the extreme base and then tube very short"	3
3	"Corolla rotate; tube c. 1 mm long; flowers occasionally cleistogamous"	Dichondra
3	"Corolla funnel-shaped; tube 5-60 mm long; flowers always opening"	4
4	"Stigma capitate or bi-globose"	Ipomoea
4	"Stigma 2-lobed, the lobes linear or oblong"	5
5	"Bracteoles 1-3 mm long, distinctly distant from the calyx"	Convolvulus
5	"Bracteoles 6-30 mm long, over-lapping and usually obscuring the calyx"	Calystegia