POLYPODIES. Ixxiii. 



(usually) on the converging apices of two or more included 

 veinlets. Veins pinnate or pinnato-furcate from a central costa ; 

 the venules reticulated in variously-formed .usually elongated 

 areoles, which produce (a few) sterile excurreut veinlets, especially 

 near the margin ; the costal areoles transverse, usually void. 



Fronds herbaceous or coriaceous, simple pinnatifid or pinnate. 

 Sori transversely uni- bi- tri- or multi-serial, usually borne on the 

 apex of converging veins, sometimes compital, rarely situated on 

 simple veins. Rhizome creeping; fronds articulated. One or 

 two pinnate species are intermediate between GoniophleUum and 

 Pklebodium, having the sori generally on simple veins, but also 

 producing them on the apices of converging veins, and having also 

 sterile, i.e., empty costal areoles. These latter are the distinguish- 

 ing peculiarities of this genus; which, however, in its most 

 genuine species produces here and there compital sori, (i.e., with 

 the receptacle forming a point whence several veins radiate), and 

 hence is not much removed from Pleopeltis, as here extended. 



Chrympteris. Sori usually at the apex of converging veins, the costal 



areoles void. 

 Ex. : P. aureum, J. 8m. I P. areolatum, J. Sm. 



P. decumanum, J. Sm. \ P. sporadoearpum, J. S>n. 



Marginariopsis. Sori usually at the apex of single veins, the costal 



areoles void. 

 Ex. : P. insequale, Moore. 



106. GONIOPHLEBITJM, Slume, Flora Java, 132 (); 

 Presl, Tent. Pterid. 185. 



MABGIICARIA, Presl, (non SoryJ; SYNAMMIA, Presl in part; PLEUB 

 GON ITJM, Presl; LEPICTSTIS, J. Smith in part ; LOPHOLEPIS, J. Smit 



Sori non-indusiate, globose (rarely oblong); the receptacles 

 punctiform (rarely oblong), situated at the apex of the lower 

 anterior venules, or of the simple excurrent free veinlets, one 

 being included within each areole. Veins forked or pinnate 

 from a central costa ; the lower anterior venules usually free and 



