Fronds dimorphous, simple or pinnate. Rhizome creeping. 

 This genus differs from Elaphoglossum in having the parallel 

 veins united by a vein which traverses the margin. In the secti- 

 onal groups here indicated, the differences presented by the course 

 of these marginal veins are not of generic value. The typical 

 species, 0. cervina, is a krger plant than the others, and more 

 compound. 



Euolfersia. Marginal vein straight. 

 Ex. : 0. cervina, JEze. 



Nebroglossa. Marginal vein arcuate. 

 Ex. : 0. longifolia, Presl. \ 0. glabrescens, Presl. 



Aconiopteris. Marginal vein zigzag, with an excurrent veinlet from 



the exterior angles. 

 Ex.: 0. subdiaphana (Acrostichum, Hook, and Grev.) 



*** Veins reticulated. 



7. SOBOMANES, Ffe, Hist. Acrost. 16. 

 POLYBOTBY.B sp., Auct.; BOTBYOTHAXLI sp., Elotzsch. 



Sori superficial, non-indusiate, the receptacles occupying the 

 under surface of the contracted fertile fronds. Veins pinnate 

 from a central costa ; venules connivent, all anastomosing at an 

 acute angle, and without free included veinlets. 



Fronds large pinnate dimorphous, the fertile pinnato-pinnatifid 

 or bi-pinnate. Rhizome robust, scandent or creeping. The 

 venation of this genus is analagous to that of Cyclodium. 



Ex.: S. serratifolium, Fee. 



8. NEUBOCALLIS, Fee, Hist. Acrost. 19. 



CHEILOLEPTON, Fee ; ? CHORIZOPTERIS, Moore ; ACROSTICHI sp., Auct. ; 

 LEPTOCHIM gp., Blume; POLYBOTBY.S sp., Mettenius ; CHBYSODII sp., 

 Mettenitis ; PCBCILOPTEBIDIS sp.,Prel; LOMABIOPSIDIB sp., MetteniiM; 

 CYBTOGONII sp., J. Smith; HETEBONEUKI sp., Fee; LOMAGEAMMATIS 

 gp., Brackenridge. 



Sori non-indusiate, the receptacles occupying the under surface 

 of the contracted fertile fronds, superficial or forming a shallow 

 longitudinal furrow each side the costa. Veins all reticulated in 

 hexagonal meshes, without free veinlets, the costal areoles larger. 



