2. HEMITELIA. § 2. AMPHICOSMIA. H 



X Secondary rachises distinctly muricale or aculeate. 



(7) H. latipinnula. 



XX Secondary rachises smooth, or roughish with fine prickles. 



D Roughish. (6) H. latebrosa. 



nn Smooth. (6a) H. caudata. 



OO Indusium distinct, rather large. 



X Tertiary segments obtuse. 8) H. manilensis. 



XX Tertiary segments not obtuse. 9j H. heterochlamydea. 

 S.s.Main rachis smooth, or rough with minute warts or pustules 

 3, Tertiary segments acute or acuminate. 



X Veins to + 9 on a side. (2) H. capensis. 



XX Veins + 10 or more on a side. 



n Pinnulae abruptly acuminate. (2a H. bicolor. 



DD Pinnulae not abruptly acuminate. 



{2b) H. merapiensis. 

 3.3. Tertiary segments blunt or bluntish. 



d. Under surface glaucous. (5) H. glaucophylla. 



S.4L. Under surface not glaucous. 



S. Main rachis more or less scaly, or (though not rarely 

 sparingly) scaly and tomentose, hairy or furfuraceous. 

 + Stipes smooth or asperous 



O Stipes often with reduced pinnae at the base. 

 Texture membranaceous or herbaceous. 

 (11 H. crenulata. 

 0() Texture coriaceous or chartaceous. 



(la) H. tonglonensis. 

 0O Stipes without reduced pinnae at the base. 



{lb) H. warihon. 

 ++ Stipes muricate or acideate. 



(Ic) H. singalanensis- 

 5.5. Main rachis naked, hairy, tomentose or furfuraceous, 

 not scaly. 

 e. Stipes without aerophores 



7. Sori costular or subcostular. 

 S. Veins to 10 on a side 



(3) H. Junghuhniana. 

 8.S. Veins 10 or more on a side. 



(3a) H. alsophiliformis. 



