G-ENERIC CHARACTERS. 



Order— VOirreODJACEM. Tribe— FOLTFOTllN^M. 



§ 1. AoEOSTICHEa;. 



(a) Fronds wTioUy fertile. 



* Veins free, 



■1. VOliY'BOU'RYAySwmboldtamdBowplcmdi Willd. Sp., 

 Flcmt. V. 99. 



Egenoipia, Schott; Lacaussadba, Gaudichaud; Ectottetxra, Fee; 



GHAJTUIilirA, -Bory ; Fee ; BOTRTOTKA-LLVS, S^lotzach MS.; PSOMIOCABPA, 



I'resl; Miceostaphtla, Fresl; Aceostichi sp,, Auct.; Oleeesi^ sp., 

 Tred ; Ajtogeammatis sp., Me ; GxiOfO&EAMiiATls sp., Asict. ; OsMUlf- 

 Ji& sp,, Jacguin. 



Sori superficial, non-mdusiate, the receptacle occupying the 

 whole under surface, or both upper and under surface of the 

 raehiformfertile fronds. Veins simple or forted, or pinnate from 

 a central oosta j vermles simple or forked, free. 



iPronds dimorphous, pinnate, or bi-tri-piunate, the fertile with 

 linear contracted segments. Ehizome creeping or scandent. — In 

 this genus occurs the highest degree of derelopment of which the 

 Ferns seem susceptible. In some of the species, the whole sur&oe 

 of the fertile fronds, above and below, is sporangiferous. Mieros- 

 iaphyla is a small plant of peculiar aspect, but does not afford any- 

 good characters on which to separate it from Folyhotrya. 

 §. lEupolyhotrya. — Fronds sporangiferous beneath; veins pinnate. 

 Ex. : P. cylindrica, KVfg. I P. oamundacea, S.B.K. 



P. articulata, J. Sm. P. appendicuJata, J. Sm. 



P. nodiflora, .BoT^. 1 P. Gaudichaudiana (Egenolfia, J?Ve.^ 



§ Microst(vpTiyla. — Fronds sporangiferous beneath; veins simple or forked. 

 Ex. : P. bifureata, Lh. 



§ Faoimocarpa. — Fronds sporangiferous on both surfaces; veins pinnate. 

 Ex. : P. caudata, Xze, ] P. apiifolia, J. Sm, 



2. RHIPIDOPTERIS, Schott, Gen, Ml, (under t. 15.) 



Pbltapteeis, IdnJc; OammnM sp.; Swariz; Aceostichi sp., .4M<rf.; 

 Olfeebi^ sp., JPreel ; PoLYBOTEY.ffi sp., J, Smith, 



Sori superficial, non-indusiate, the receptacles occupying the 



