152 CHARACTERS OF TRIBES AND GENERA. 



apices anastomosing at the margin, forming a continuous 

 marginal vein, or one or more series of marginal areoles. 

 Sporangia occupying the whole of the venules, forming 

 linear parallel and reticulated sori. 



Type. Syngramma alismce folia, J. Sin. 



lllust. Lond. Jour. Bot., v. 4, t. 7, 8, B ; Moore Ind. Fil., 

 p. 46, B ; Hook. Syn. Fil., t. 6, fig. 52, d. e. f. 



OBS. The species on which this genus is founded was 

 originally described by Presl., in his Bel. Haenkeance, as a 

 species of Diplazium; but his original specimen having 

 come into my possession, with the addition of others, 

 clearly showed that the sori were destitute of indusium, 

 having the true character of Gymnogramma, but differing 

 in the venation being anastomose, this led me to characterise 

 it as a distinct genus under the above name. 



Sp. S. alismsefolia, J. Sm., (Bedd. F. Brit. Ind., pi. 240) ; 

 S. vittseformis, J. Sm. ; S. obtusifolia, Hook.; S. Lobbiana, 

 Hook. ; S. Borneensis, Hook. ; S. Wallichii, Hook. ; S. 

 pinnata, Hook. 



Natives of Malayan, Borneo, and Polynesian islands. 

 Besides the usual pinnate fronds of S. pinnata it also 

 produces simple fronds, which in the specimens seen by 

 me were sterile ; they are, nevertheless, extremely like 

 the Hemionitis lanceolata, described and figured by Sir 

 W. Hooker, in the Second Cent. Fern, t. 55, but the 

 venation is more uniform reticulated and wholly sporangi- 

 ferous, as in true Hemionitis. 1 am, however, inclined to 

 consider it a state of S. pinnata. 



66. DICTTOGRAMMA, Fee. (1851). 

 Gymnogrdmma sp.^ Hook. Sp. Fil. 



Vernation uniserial, sub-fasciculate, decumbent. Fronds 

 contiguous, pinnate, or sub-bipinnate, 1 to 3 feet high,, 



