KEY TO THE SECTIONS

1	Fronds always in 2 rows on dorsal surface of rhizome; all acrophylls simply pinnate. Spp. 1-9 Teratophyllum sect. Teratophyllum
1'	Fronds of fully developed rhizome in more than 2 rows; acrophylls bipinnate or pinnate (in Malesian sp. 10 bipinnate) Teratophyllum sect. Polyseriatae