CHAEACTERS OF TRIBES AND GENERA. 105 



** Fronds pinnatifid. 



P. ebenipes (Hook.) (Poly, melanopus, Wall.) ; P. tri- 

 fidum (Don.) (v v.) (Poly, oxylobum Wall.') ; P. palmata 

 (Bl.) (v v.) ; P. laciniatum (Bl.) P. incurvata (Bl.) (v v.). 



20. NIPHOPSIS, J. 8m. (1857). 

 Polypodium sp., auct. ; Hook. 8p. Fil. 



Surculum short, slender. Fronds simple, linear lanceo- 

 late, coriaceous, opaque, 6 to 12 inches long, densely 

 covered with stellate scales. Veins internal, obscure, com- 

 pound, anastomosing. Primary veins indistinct. Receptacles 

 punctiform, compital. Sori oval, large, transverse uni- 

 serial. 



Type. Polypodium angustatum, Sw. 



Illust. Hook, and Grev. Ic. Fil., t. 94 ; Hook. Gard. 

 Ferns, t. 20 ; J. Sm. Ferns, Brit, and For., fig. 14. 



OBS. This genus is founded on a single species, which 

 agrees in general habit with Nipliobolus, but differs in the 

 sori being large, oval, and arranged in a regular trans- 

 verse row on each side of the mid-rib, in that respect 

 agreeing with the normal character of Phymatodes, to 

 which it bears the same relationship as Niphidium does 

 to Pleuridium. 



Sp. N. angustata (Sw.) (v v.) (Polypodium sphceroce- 

 phalus, Wall. ; Hook, and Grev. Ic. PL, t. 94). 



A native of India, Malayan, and islands of the Pacific 

 and North Australia. 



21. LBCANOPTBRIS, Eeinw. (1825). 

 Polypodium sp. t auct. ; Hook. Sp. Fil. 

 Surculum thick and fleshy, branching, thickly covered 

 with large peltate imbricate scales, branches short, con- 



