1	"Plants epiphytic on small branches and twigs; leaves whorled, linear-lanceolate to elliptic-lanceolate"	Daltonia
1	"Plants predominantly terrestrial or lithophytic, rarely on tree ferns or tree bases; leaves complanate, ovate, oblong, elliptic, spathulate or oblanceolate"	2
2	"Costa absent or weak, ending below mid leaf and usually forked near base"	Calyptrochaeta
2	"Costa strong, extending beyond mid leaf, sometimes forked above mid leaf"	3
3	"Leaves fragily attached to stem and easily rubbed off; margins coarsely dentate"	Achrophyllum
3	"Leaves firmly attached and not readily removed if rubbed; margins entire to denticulate"	Distichophyllum