CHARACTERS 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.—Nirnorsis, J. Sm. (1857). 
Polypodium sp., auct. ; Hook. Sp. 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. Sort oval, large, transverse uni- 
serial. 
Type. Polypodium angustatum, Sw. 
Ilust. Hook. and Grev. Ic. Fil, t. 94; Hook. Gard. 
Ferns, t. 20; J. Sm. Ferns, Brit. and For., fig. 14. ` 
Oss.— This genus is founded on a single species, which 
agrees in general habit with Niphobolus, but differs in the 
sori being large, oval, and arranged in a regular irans- 
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. 
` Bp. N. angustata (Sw.) (v v.) (Polypodium splueroce- 
` phalus, Wall. ; Hook. and Grev. Ic. Pl., t. 94). | 
` A native of India, Malayan, and islands of the Pacific 
and North Australia. 
91.—LzcawoprERIS, Reinw. (1825). 
"e Polypodium sp., auct.; Hook. Sp. Fil. 
= Sureulum thick and fleshy, branching, thickly covered ` ` 
with large peltate imbricate scales, branches short, con-. 
