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 alismefolia, J. Sm. 
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. 
Oss.—The species on which this genus is founded was 
originally described by Presl., in his Rel. Haenkeane, 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. alismefolia, J. Sm., (Bedd. F. Brit. Ind., pl. 240) ; 
S. vitteformis, 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. I am, however, inclined to 
. consider it a state of S. pinnata. 
66.—DiorvoanAMMA,. Fée. (1851). 
Gymnogramma sp., Hook. Sp. Fil. SC 
Vernation uniserial, sub-fasciculate, decumbent. Fronds - 
contiguous, pinnate, or sub-bipinnate, 1 to 3 feet high, | 
