N $ 
GENERA OF FERNS. 23 E 
WU 
mitted to examine. On looking at the habit and verat 
of this fern, it might readily be taken for specimens of 
Drynaria irioides ; but the continuous marginal sorus, with 
the interiorly attached special indusium, prove it to belong 
to Lindsee, and the compound venation readily distinguishes 
it from all other genera of this tribe. In habit and position 
of the sori, and nearly also in venation, it agrees with Dry- 
moglossum lanceolatum, the presence of an indusium in the 
present genus being the chief distinction. With Schizoloma 
it coincides in aspect and texture, but is distinguished by 
the free veinlets terminating in the irregular areoles. 
100 Linpsaa. Dry. 
Costa excentric or wanting; veins radiating, forked; ve- 
nules direct, their apices transversely combined by a contin- 
uous sporangiferous receptacle. Special indusium linear, 
usually shorter than the indusiiform margin, constituting a 
continuous sorus. 
_ Fronds simple, cordate, pinnate or bipinnate ; pinnæ ob- 
long dimidiate, flabellate or lunate, the superior margin only 
Sertile, entire or rarely dentate ` the sori then interrupted. 
Ezamp. 1. L. reniformis, Dry. 2. L. sagittata, Dry. 
3. L. elegans, Hook. 4. L. falcata, Dry. 5. L. brevifolia, 
Reinw. 6. L. cultrata, Sw. 7. L. Guianensis, Dry. 8. L. 
trapeziformis, Dry. 
Iilust. Lins. Trans. vol iii. t. 7, 8, 9, 10. Schk. Crypt. t. 
114. Hook. Gen. Fil. t. 63. A. 
Obs. The direct free veins of the sterile fronds and the 
unilateral sori distinguish this genus from any of the pre- 
ceding. 
101. SvxaPHLEBIUM, J. Sm. 
(Lindsee sp. Reinw. Wall. Blume). 
Costa excentric or wanting; veins forked; venules angu- 
larly anastomosing, and combined at the margin by a con- 
tinuous or interrupted sporangiferous receptacle. Special 
indusium equal with the indusiiform margin, constituting con- 
tinuous or oblong sori. 
