288 
COPELAND. 
KEY TO THE PHILIPPINE SPECIES'. 
Frond thin and herbaceous, or subfleshy, pale® thin, usually pale, 
roots not coarse and black. 
Sori all or many dryopteroid. 
Frond less than 15 cm high including stipe 1. hyalostegium 
Frond taller, stipes clustered. 
Frond deltoid 2. Loheri 
Frond not deltoid 7. halconense 
Sori elongate, straight, curved or double. 
Rhizome long-creeping, margin mostly entire. 
Frond lanceolate-oblong, pinnae incised 3. japonicum 
Frond lanceolate, only the lowest pinnae incised. 
Pale® of stipe 5 mm long . 5. acrotis 
Pale® shorter J 4. grammitoides 
Fronds clustered, margins toothed. 
Pinnae cut to a winged rachis 8. anisopterum 
Bi pinnate, pinnules cuneiform 32. geophilum 
Bipinnate, pinnules round-ovate, merely toothed 10. philip pinense 
Pinnules almost or quite pinnate. 
Ultimate divisions small and narrow 9. aristulatum 
Ultimate divisions broad and ample 14. stramineum 
Frond harsh, sori dryopteroid 6. drepanopteron 
Frond herbaceous, pale® brown, roots dark and rigid. 
Indusium none — - 13. Elmeri 
Indusium present 11. brevipinnulum 
Frond membranaceous, pale® and roots black, sori not costular.... 26. meyenianum 
Frond herbaceous, pale® and roots black, sori costular 12 . nigripes 
Frond harsh, papyraceous or coriaceous, pale® and roots usually 
black, sori elongate. 
Frond tripinnate, or pinnules cut f to the midrib. 
Ultimate segments inciso-crenate 19. silvaticum 
Ultimate segments entire or serrate. 
Segments about 5 mm wide 15. platyphyllum 
Segments narrow. 
Stipe spiny, pinn® many 20. Blumei 
Stipe smooth, pinn® few. 
Segments sharply toothed 17. atratum 
Segments almost entire. 
Pinn® opposite 18. oligosorum 
Pinn® alternate 19 . silvaticum 
Frond bipinnate, veins free. 
Lobes of pinnules broad, lowest sori long, curved. 
Pinnules very acuminate, sori remote from margin 24. davaoense 
Pinnules acuminate, sori nearing margin 22. dolichosorum 
Pinnules obtuse, all rachises scaly 23. vestitum 
Lobes narrow, sori not very long nor curved. 
Stipe and rachis aculeate 21. fructuosum 
Stipe and rachis not spiny. 
Pinnules not very oblique. 
