332 CHARACTERS OF TEIBES AND GENERA. 



ovate-lanceolate and acuminate. Veins pinnately forked, 

 venules parallel till near the margin, then anastomosing, 

 and reticulated, terminating with free marginal veinlets. 

 Sporangia bilateral, constituting binate linear sori. Indusium 

 plane. 



Type. Diplazium alismcefolium, Presl. 



Dlust. Hook. Ic. PL, t. 936 and 939 ; Moore Ind. Fil., 

 p. 42, B. 



OBS. This consists of a few species, differing from 

 Diplazium, in the veins being parallel and acutely anasto- 

 mosing near the margin, which latter, characterises it from 

 the following genus, Callipteris, in which the venules anas- 

 tomose in pairs between the primary veins. 



Sp. 0. cordifolium, (Bl.) (Diplazium ovatum, Wall.} 0. 

 alismaefolium, Pr. ; 0. elegans, /. Sm. (1841). 



OBS. Natives of India, Malay, and Philippine Islands. 

 The two first species were originally described as having 

 only simple fronds, but we now possess specimens of simple 

 and pinnate fronds growing from the same root, which 

 shows the necessity of being careful in describing species 

 from inadequate materials. 



190. CALLIPTERIS, Bory. (1804), J. Sm. (1841). 



Anisogonium, Pr. ; Asplenium, sect. Anisogonium, Hook. Sp. 

 Fil. ; Diplazium sp. auct. 



Vernation fasciculate, erect, subarboroid. Fronds pinnate, 

 or bipinnatifid and bipinnate, 2 to 5 feet high, often vivi- 

 parous. Veins costseform and pinnate, each opposite pair 

 of venules angularly anastomosing, the superior ones usually 

 free, sporangiferous on both sides, constituting binate sori, 

 each furnished with a linear indusium, the one opening 

 interiorly the other exteriorly. 



