102 CHARACTERS OF TRIBES AND GENERA. 
deny some states of S. heterocarpa and S. Feei a place in ` 
Pleuridium. 
This genus consists of about 8 to 10 known species, all ` 
natives of Tropical India, Malayan Peninsular and islands. 
The genus: Lorogramma contains species analogous in 
habit, venation, and linear sori, but differs in having | 
adherent vernation. 
* Fronds simple. | 
Ex. S. caudiforme (Bi.) (v v.); S. Feei, Bo?y.; S. ma- 
crophylla, Bl.; S. Wrightii (Hook.); S. heterocarpa, Bi, ; 
S. Hamiltoniana, Wall. j 
** Fronds pinnatifidly pinnate. 
S. pothifolia (Don.) (v v.) 
Sect. 4.—PnYMATODEZ. 
18. PnYwaropzs, Presl (1836). 
Polypodium sp. auct., Hook. Sp. Fil. 
Surculum generally thick, short, or much elongated, 
becoming smooth. Fronds simple, pinnatifid, or pinnate, - 
smooth, coriaceous, or thin, flaccid, segments adherent with ` 
the rachis. Primary veins undefined or evanescent, rarely 
defined. Venules compound anastomosing, with free vein- | 
lets. terminating in the areoles, internal, obscure, or 
evident. Receptacles compital, in some deeply immersed. ` 
Sori round or oblong, sub-medial, transversely uniserial, or 
irregular by confluence, naked. 
Type. Polypodium Phymatodes, Linn, 
Ilust. Hook. Fil. Exot. t. 22, 25; Hook. Gard. Ferns, ` 
LA: Moore Ind. Fil. p. 62, fig. 7; J. Sm. Ferns, ` 
Brit. and For., fig. 21; Hook. Syn. Fil, t. 5, fig. 
48 m. xi dr ~ 
