1	"Plants shrubs or perennial climbers"	2
1	"Plants annual or perennia herbs, sometimes large and shrubby"	3
2	"Sepals 7-10 mm long; corollas 4-5 cm long, glabrous; capsules glabrous or almost so"	"Astripomoea procera"
2	"Sepals 4-5 mm long; corollas 1.5-2.3 mm long, mid-petalline areas hairy; capsules tomentaose"	"Astripomoea nogalensis"
3	"Plants perennial herbs with several, more or less prostrate stems from a woody rootstock; corollas completely purple or mauve"	"Astripomoea malvacea"
3	"Plants annual or short-lived perennial herbs with a single erect stem, often branched above the base;corollas white with purple centres"	4
4	"Corollas 1-1.5 (_2) cm long; leaf blades more or less ovate"	"Astripomoea lachnosperma"
4	"Corollas 1.8-3. cm long; leaf blades elliptic to elliptic-lanceolate"	"Astripomoea hyoscyamoides"