1	"Corolla > 20 mm long; capsules 5-7.5 mm wide"	Artanema
1	"Corolla < 20 mm long; capsules 2-4 mm wide"	2
2	"At least some nodes bearing 2 or 3 flowers per axil"	Yamazakia
2	"All nodes bearing 1 flower per axil"	3
3	"Calyx fused for much of its length (Torenia crustacea, T. polygonoides)"	Torenia
3	"Calyx segments free to the base"	4
4	"Capsule ovoid, < twice length of calyx"	Lindernia
4	"Capsule cylindrical, > twice as long as calyx"	5
5	"All four stamens fertile (Torenia anagallis)"	Torenia
5	"Only the upper 2 stamens fertile"	6
6	"Upper stamens with 2-celled anthers"	Bonnaya
6	"Upper stamens with 1-celled anthers (Lindernia clausa)"	Lindernia