| 939 CHARACTERS OF TRIBES AND GENERA, 
J ovatelanceolate 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 alismefolium, Presl. 
Ilust. Hook. Ie. PL, t. 936 and 939; Moore Ind. Fil, 
p. 42, B. 
` Oss.—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. O. cordifolium, (Bl) (Diplazium ovatum, Wall.) ; O. 
alismefolium, Pr. ; O. elegans, J. Sm. (1841). 
Oss.—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,—Catipreris, 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 costeform 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- — 
— the other er 
