20 POLYPODIACE.E OF THE PHILIPPINE ISLANDS. 



Goniopteris: Vemlets from neighboring veins anastomosing regularly. 



1. Terminal pinna much exceeding the lateral, lobes uniform. 



2. Sori small, lamina not villous (33) N. simplicifolium 



2. Sori large, lamina villous. 



3. Frond obtuse (34) N. Bakeri 



3. Frond acuminate (35) N. canescens 



1. Terminal pinna exceeding lateral or not, lobes of pinnas 



very unequal (36) N. diversilobum 



1. Terminal pinna hardly exceeding lateral, lobes uniform. 

 2. Rhizome creeping. 



3. Lower pinnae hardly, if at all, reduced. 



4. Pinnae entire (37) N. rubidum 



4. Segments of pinnae entire. 



5. Sori marginal in the lobes (38) N. pteroides 



5. Sori not confined to lobes, pinnae 

 not lobed over half way to costa. 



6. Indusium hairy (39) N. unitum 



6. Indusium absent, sori in- 

 definite (40) 2V. aoristisorum 



6. Indusium absent, sori definite. 



7. Proliferous (41) N. proliferum 



7. Not proliferous (42) N. urophyUwn 



6. Indusium present, not hairy (43) N. moulmeinense 

 5. Sori not confined to lobes, pinnae 



lobed two-thirds of way to costa.. (44) X. extensum 



4. Segments of pinnae sharp toothed (45) N. Otaria 



3. Lower pinnae shorter than the succeeding. 



4. Glabrous (46) N. aridum 



4. Not glabrous beneath. 



5. Rachis nearly naked (47) N. cucuUatum 



5. Rachis villous, sori marginal (48) N. loherianum 



5. Rachis villous, sori medial. 



6. Pinnae 15 cm. long, villous 



beneath (49) N. invisian 



6. Pinnae 25 cm. long, gland- 

 ular (50) N. hirsutiim 



2. Rhizome erect. 



3. Pinnae entire, or not lobed one-third of dis- 

 tance to midrib. 

 4. Lowest pinnae not much reduced. 



5. Pinnae under 10 cm. long (51) N. glandulosmn 



5. Pinnae over 20 cm. long (52) N. philippinense 



4. Lowest pinnae reduced. 



5. Rachis and lower surface glabrous (53) JV. latipinna 

 5. Rachis and lower surface not 

 glabrous. 

 6. Lower pinnje gradually 



smaller and deflexed (54) N. amboinense 



6. Lower pinnae very abruptly 

 reduced. 

 7. Veinlets 3 to 4 on a 



side (55) N. Arbuscula 



7. Veinlets 6 to 9 on a 



side (56) N. pennigerum 



3. Pinnae incised one-third or two-thirds of dis- 

 tance to midrib. 



