1	"Twining, yellowish or pale parasites, with leaves reduced to small scales; flowers very small, in globular heads"	Cuscuta
1	"Herbs, shrubs or climbers, if the latter then not parasitic, leaves not reduced to scales and flowers not small and in globular heads"	2
2	"Ovary distinctly bilobed; styles 2, inserted between the lobes"	Dichondra
2	"Ovary entire; style or styles, if present, terminal"	3
3	"Calyx 5-toothed, teeth shorter than tube"	Wilsonia
3	"Sepals 5, free"	4
4	"Style absent; stigma ±conical with 5–10 raised rays; fruit a berry"	"Erycibe {Erycibe coccinea}"
4	"Style present; stigma not as above; fruit capsular or nut-like"	5
5	"Styles 2, free or united for up to half their length"	6
5	"Style 1, entire or almost so"	8
6	"Styles united at the base"	Bonamia
6	"Styles free"	7
7	"Styles forked at the tip into 2 linear stigmas"	Evolvulus
7	"Styles each with a capitate stigma"	"Cressa {Cressa australis}"
8	"Stigmatic lobes linear to oblong"	9
8	"Stigmatic lobes globular"	12
9	"Stigmatic lobes 4–8; ovules 1 per locule"	Polymeria
9	"Stigmatic lobes 2; ovules 2 per locule"	10
10	"Hairs trifid"	Jacquemontia
10	"Hairs simple or absent"	11
11	"Bracts large ±enclosing the calyx, persistent"	Calystegia
11	"Bracts small, distant from the calyx"	Convolvulus
12	"Outer sepals decurrent on pedicel"	"Aniseia {Aniseia martinicensis}"
12	"Outer sepals not decurrent on pedicel"	13
13	"Fruit small, indehiscent, 1-seeded; sepals at fruiting enlarged, spreading, scarious and strongly reticulately veined; hairs bifid"	Duperreya
13	"Fruit capsular or if indehiscent then fruiting sepals not as above; hairs simple, stellate or absent"	14
14	"Pollen smooth"	15
14	"Pollen spinulose"	18
15	"Fruit large, circumscissile, upper part separating with the style leaving a hyaline window over the seeds"	Operculina
15	"Fruit splitting longitudinally or irregularly dehiscing"	16
16	"Leaf blade linear with a dentate auriculate base"	"Xenostegia {Xenostegia tridentata}"
16	"Leaf blade not as above"	17
17	"Plants densely stellate-hairy; bracteoles prominent, 6-20 mm long"	"Davenportia {Davenportia davenportii}"
17	"Plants glabrous or simple-hairy; bracteoles to 5 mm long"	Merremia
18	"Corolla urceolate, constricted at the top of the tube"	"Lepistemon {Lepistemon urceolatus}"
18	"Corolla funnel-shaped, campanulate, or salver-shaped, not distinctly urceolate"	19
19	"Leaf blade with glandular black dots on lower surface; calyx about twice the length of the capsule and completely enclosing it at maturity"	Stictocardia
19	"Leaf blade without glandular dots on lower surface; calyx not as above"	20
20	"Fruit ±woody, indehiscent; lower surface of leaf blade densely hairy"	"Argyreia {Argyreia nervosa}"
20	"Fruit ±thin walled or leathery, dehiscing variously, or if indehiscent then lower surface of leaf blade glabrous or nearly so"	21
21	"Fruit indehiscent, 1-seeded"	"Turbina {Turbina corymbosa}"
21	"Fruit dehiscent, if indehiscent, 2–4-seeded"	Ipomoea