CHARACTERS OF TRIBES AND GENERA. 93 



12 feet long, smooth, rarely pilose ; pinnae 5 to 10 inches 

 in length, linear lanceolate, obtuse or acuminate, generally 

 opposite or nearly so, and articulate with the rachis. 

 Veins one or more times forked or pinnate, the lower 

 exterior venules free and soriferous, the others angularly 

 anastomosing. Receptacles punctiform, terminal, generally 

 immersed. Sori transverse uniserial, furnished with indu- 

 saform lacinate scales. 



Type. Polypodium verrucosum, Wall. 



Illust. Hook, and Bauer, Gen. Fil., t. 14. Hook. Gard. 

 Ferns, t. 41. Moore Ind. Fil., p. 59, figs. 14. J. 

 Sm. Ferns Brit, and For, fig. 8. 



OBS. The different aspect, and the pinnse being articu- 

 lated with the rachis, has induced me to separate the 

 species of this genus from Gonioplilelyium. The species 

 are also distinct geographically, being entirely natives of 

 the eastern tropics. 



* Fronds pinnatifid. 

 S. lachnopus (Wall.), S. amcena (Wall.). 



** Fronds pinnate. 



S. arguta (Wall.), S. cuspidata (Bl.) t (v v.), S. subauri- 

 culata (SI), (vv.). S. pallens (BL), S. verrucosa (Wall), 

 (vv.). 



11. PHLEBODIUM, R. Br. (1838). 

 Polypodium sect. Phlebodium, R. Br. Polypodium sp. ; auct., 



Hook. Sp. Fil. 



Surculum thick and fleshy. Fronds large, 2 to 6 feet 

 high, pinnatifid or subpinnate, papyaceous, smooth, gene- 

 rally more or less glaucous, segments adherent. Veins 

 pinnate, venules arcuately or angularly anastomosing, pro- 

 ducing two or three excurrent veinlets, terminating in the 



