17 
Fam. 7. Meteoriacez, 
18. Papillaria, Alar leaf-cells numerous; inner 
cells dilated; costa short and double. 
19. Meteorium. Alar leaf-cells few; inner cells 
sublinear; costa simple. 
Fam. 8. Hookeriacee. 
I. Hookeriece. Capsule and pedicel smooth. Upper 
leaf-cells very dilated. 
A. Leaves with 2 long nerves, generally narrowly 
limbate; upper cells round-hexagonal. 
20. Hookeria. Leaves smooth; cells large; nerves 
not spiniform. Calyptra lobulate at base. Monoecious 
or polygamous. 
21. Callicostella. Leaves papillose; cells not large; 
nerves spiniform. Calyptra fringed. Monoecious. 
B. Leaves not or obsoletely costate, not distinctly 
limbate; upper cells oval-hexagonal. 
i 22. Pterygophyllum. Leaves smooth; cells ue. 
=- Calyptra lobulate at base. Monoecious. 
; II. Daltoniee. Capsule and pedicel rough. Upper 
m leat cells suboblong. 
“3323. -Daltonia. Leaves smooth, broadly limbate; costa 
hice and simple. Calyptra fringed below the narrow point. 
:  Monoecious. or synoecious. 
Fam. 9. Leskeacez. 
A. Leaves with papilliferous cilia. 
24. "Thelia. Leaves strongly papillose, tenis. the 
. broadly round-ovate base abruptly tapering to the long 
. acumen, not recurved; upper and middle cells rotundate; 
. Costa short. Stem often with numerous parapiylia; bran- 
- r9 ches erect and julaceous. , 
B. Leaves not ciliate. 
o. du Stem with paraphyllia. Leaves ‘often as Aa 
af? 95 Pterygynandrum. Leaves papillose; upper cells 
suboblong, the inner ones narrower; costa short, simple 
