118 P0LYP0DIACE.13 OF THE PHILIPPINE ISLANDS. 



3. Fertile and sterile fronds similar. 

 4. Sori superficial. 



5. Sori uniseriate, rhizome scaly. 



6. Frond green (54) P. trifidum 



6. Lower surface blue (55) P. glaucum 



5. Sori pluriseriate, rhizome 



naked (56) P. affine 



4. Sori shallowly immersed, veins in- 

 conspicuous (57) P. Pliymatodes 



4. Sori deeply immersed, veins evident. 



5. Segments linear-oblong (58) P. nigrescens 



5. Segments linear (59) P. longissinium 



1. Fronds pinnate. 



2. Main veins conspicuous. 



3. Rachis mostly winged by decurrent pinnae... (60) P. palmatutn 



3. Most of rachis not winged (61) P. angustatum 



2. Main veins not conspicuous. 



3. Spots of lime en upper surface (62) P. albidosquamatum 



3. Without lime spots (63) P. lagunense 



§ Selligxjea. 



1. Frond simple and entire. 

 2. Frond membranous. 



3. Rhizome scales linear, nearly black (64) P. SelUguea 



3. Rhizome scales lanceolate, brown (65) P. niacrophyllum 



2. Frond coriaceous. 



3. Apex caudate (66) P. caudiforme 



3. Apex obtuse (67) P. vulcanicum 



2. Frond exceedingly leathery (68) P. Elmeri 



1. Frond deeply pinnatifid (69) P. elUpticuni 



§ Mybmecophila. 



1. Frond entire (70) P. sinuosum 



1. Frond deeply pinnatifid (71) P. lomarioides 



§ Dbynariopsis. 



1. No specialized fertile part of frond (72) P. heracleum 



1. Sori restricted to contracted apical part of frond (73) P. meyenianum 



§ Eupolypodium. 



(1) P. jagorianum Mett. Rhizome 3 to 10 cm. long, clothed with light- 

 brown chaff; fronds clustered, sessile or narrowed to a very short petiole, 

 the larger ones 10 cm. long and 6 mm. broad, entire, obtuse, coriaceous, 

 clothed, especially near the margin and apex, with reddish hairs about 

 1 mm. long, usually in stellate clusters; veins almost invisible, forked 

 once; sori near tlie midrib, on a linear-oblong superficial receptacle. 



Philippines Jagor 835; Castillo, Loher; Mount Mariveles, 1200 m. Merrill 

 3230, Copeland. 



(2) Polypodium Christi Copeland n. Sp. Rhizome short, bearing de- 

 ciduous stramineous paleae; stipes clustered, not articulate, to 15 mm. 

 high, beset with short hairs; fronds linear, 4 to 8, or rarely to 15 cm. 

 high, 2 to 3 mm. broad, obtuse or subacute, very gradually attenuate 

 downward, entire or nearly so, subeoriaceous, both surfaces bearing scat- 



