1	"Plants erect or climbing shrubs; corollas bluish purple with yellow throat"	"Thunbergia holstii"
1	"Plants twining or climbing herbs or shrubs; corollas yellowish or white"	2
2	"Corollas yellow; corolla tubes up to 50 mm long; petioles more or less winged; stems pilose"	"Thunbergia alata"
2	"Corollas white or cream; corolla tubes up to 85 mm long or longer; stems glabrous"	"Thunbergia guerkeana"