KEY TO THE SPECIES

1	Leaves elliptic to ovate, less than 15 cm wide, cuneate at base. Spathes 2-3 cm long. Perigone-tube 8-15 mm long; segments less than 25 mm long Proiphys alba
1'	Leaves subcircular to broadly ovate, slightly cordate at base, 15 cm or more wide. Spathes 3-10 cm long. Perigone-tube 22-35 mm long; segments 25 mm long or more Proiphys amboinensis