Ixxiv. GEXEBA Of FEENS: 



fertile, the rest angularly or arcuately anastomosing (in one or 

 more, frequently several series), and producing from their angles 

 free excurrent veinlets which are often fertile; the marginal 

 yeinlets free. 



Fronds simple pinnatifid or pinnate, herbaceous or coriaceous, 

 sometimes scaly, the fertile often much narrower. Sori trans- 

 versely uni- bi- or tri-serial, sometimes squamiferous ; the 80- 

 riferous excurrent veinlet in 6?. mtmmulariwm hardly developed. 

 Ehizome creeping, the fronds articulated. A tolerably well- 

 defined group, yet merging into Pklebodium through some aber- 

 rant species in which the free fertile veinlet in the costal areole 

 is inconstant, and combined in the same fronds with sori on the 

 apices of converging veinlets. The terminal sorus on the free 

 veinlets, one of which occupies each costal areole, however, gene- 

 rally serves to distinguish the genus. 



Mcvrginaria. Fronds monomorphous ; sori round. 



Ex. : G. albo-punctatum, J. Sm. 

 G. argutum, J. 8m. 

 G.dasypleuron(Polypod..srze. ) 

 G. furfuraceum (Polypodium, 



SchlechJ 

 G. subauriculatum, Presl. 



G. neriifolium, Hook. 



G. verrucosum, J. Sm. 



G. fraxinifolium (Polypodium, JaeqJ 



G. lepidopteris (Aerostichum, L. and 



Fiich.; Polypod. sepultum, fife J 

 G. surucuchense (Polypodium,.Hbo/fc .) 



Crypsinus. Fronds dimorphous ; sori round. 



Ex. : G. ciliatum, J. Sm. I G. nummularium (Marginaria, PreelJ 



G. piloselloides,,r.yS. G. tectum, J. Sm. 



G. vaccinifolium, J. Sm. \ G. myrtillifolium (Polypodium, Klf .) 



Synammia. Fronds monomorphous ; sori elongated. 

 Ex. : G. trilobum (Polypodium, Cav. ; Synammia, Presl J 



106. CAMPYLONEURTTM, Presl, Tent. Pterid. 189. 



CTKTOPHLBBHTM, B. Brown : J. Smith ; MABGINABIA, Link ; POLTPODII 

 sp., Auct. ; GEAMMITIDIS sp., Auct. 



Sort non-indusiate, globose ; the receptacles medial, rarely 

 terminal, on the lower anterior free venules, or on the simple 

 excurrent free veinlets (of which two are usually included side 

 by side within each of the sub- quadrate areoles). Veins pinnate 

 from a central costa, prominent, parallel; venules opposite anas- 

 tomosing transversely in a series of parallel angulate arcs, from 

 which proceed two or more excurrent veinlets; the veinlets 



