~ drical, forming linear oblique sori. 
334 CHARACTERS OF TRIBES AND GENERA. 
venules. Sporangia unilateral, anterior. Indusium plane, 
forming linear, sub-transverse sori, 
Type. Asplenium Finlaysonianum, Wall. 
Illust. Hook. Ie. Pl., t. 938, 937. 
Oss.—This genus is founded on two species, which agree 
in habit and texture with the Falcatum group of Asplenium 
(Tarachia, Pr.), differing only in having anastomose vena- 
tion. Mr. Moore makes it a section of the genus Hemidic- 
tyum, from which it differs entirely in habit and texture, 
and in the coste being obscure and evanescent. 
Sp. A. Finlaysonianum, J. Sm. (Asplenium, Wall. 
Bedd. F. Brit. Ind., pl. 72); A. Purdieanum, J. Sm. 
(Asplenium Hook. Ic. PL, t. 937). 
- Ops. — The first is a native of India, Assam, Malay Islands, 
and Penang, the second of New Granada and Peru. 
1929.—A rrANTODIA, R. Br. (in part, 1810). 
Hook. Sp. Fil. 
Vernation fasciculate, erect. Fronds pinnate, 2 to 3 feet | 
high, pinnæ linear, membraneous, 4 to 6 inches long, 1 
inch broad, with a central perfect coste. Veins simple, 
sub-parallel, becoming forked towards the margin, and 
.. anastomosing, forming elongated areoles, with free, mar- 
 ginal, clavate veinlets. Sporangia unilateral, anterior on 
the lower part of the venule. Zndusium vaulted, cylin- 
- Type. Asplenium reticulatum, Wall. eR 
Ilust. Hook. and Bauer, Gen. Fil t. 120 A.; Moore, 
Ind. Fil, p. 38 B.; Hook. Syn. Fil, t. 4, fig. 99. — | 
Ons.—The name Allantodia was in 1810 given by Robert 
Brown to the present species, which he associated with 
certain species, of very different habit, Së Roth he 
