152 CHAEACTEES OF TRIBES AND GENEEA. 



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 alisma'folia, J. Sm. 



Ulust, 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. 



Oes. — The species on which this genus is founded was 

 originally described by Presl., in his Eel. HaenheancE, as a 

 species of Biplazium ; 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. alismajfolia, /. Sm., {Bedel. F. Brit. lad., pi. 240) ; 

 S. vittfeformis, /. 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 iS". pinnata it also 

 produces simple fronds, which in the specimens seen by 

 me were sterile ; they are, nevertheless, extremely like 

 the Hemionitis lanceolafa, 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. I am, however, inclined to 

 consider it a state of S. pinnata. 



66. — DlCTTOGEAMMA, Fee. (1851). 

 Gymnogramma sp.. Hook. Sp. Fil. 

 Vernation uniserial, sub-fasciculate, decumbent. Fronds 

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



