1	"Tepasl very dissimilarin both length and shape"	"Alternanthera pungens"
1	"Tepals similar in both length and shape"	2
2	"Tepals with only 1 prominent vein, the midrib"	"Alternanthera sessilis"
2	"Tepals prominently 3-veined in the lower half"	3
3	"Pseudostaminodes much shorter than the stamens; plants mat-forming, with prostrate branches"	"Alternanthera paronychioides"
3	"Pseudo staminodes as long as the stamens; plants erect or ascending, cultivated as ornamentals"	"Alternanthera bettzickiana"