1	"Lamina margins entire; fruit and leaves never flushed with purple"	"Diplaspis nivis"
1	"Lamina margins crenate; fruit, petioles, leaf sheaths and leaf laminas (abaxial surface) often flushed with purple"	2
2	"Plants androdioecious; leaf margins recurving at the hydathodes, margin lobes overlapping; styles and stylopodia together c. 1/3 of the total fruit length"	"Diplaspis cordifolia"
2	"Plants with bisexual flowers; leaf margins not recurving at the hydathodes, margin lobes not overlapping; styles and stylopodia together c. 1/4Ð1/6 of the total fruit length"	"Diplaspis hydrocotyle"