31 ON GENERA AND SPECIES. 



Ex. Gi-ammitis, 8w., Polypodium, Linn., Struthiopteris, W. 

 Sect. 2. SymplophlebieiB, /. Sin. Veins simple or com- 

 pound anastomosing. 

 Ex. Goniopteris, Pr., Menlsoium, Sohred., Drynaria, Bor;/. 



Tribe II. — Ackostichie;e. 

 Fertile fronds contracted. Sori amorphous, naked. 

 Sect. 1. Orthophlebieaj. Veins free. 

 E.V. Elaphoglossum, ScJiotf, Stenochtena, J. Sm., Polybo- 



trya, Humh. 

 Sect. 2. SymplopUebieas. Veins anastomosing in various 



ways. 

 Ex. Aconioptoris, Pr., Aorostichum, Linn., Platyceriam, Desv. 



Tribe III. — Pteride^, /. Sm. 

 Sori marginal, punctiform or linear, or intramarginal 

 transverse, furnished with a latter exterior attached indu- 

 sium. 



Sect. 1. Chilosoreaj, /. Sm. Sori seated on the margin. 

 Ex. Cheilanthes, Sw., Pteris, Linn., Adiantum, Linn. 

 Sect. 2. Metasoraj, J. Svi. Sori oblong or linear. 

 Ex. Blechnum, Linn., Lomaria, Willd., Woodwardia, Sm. 



Tribe IV. — Asplbnib^, J. Sm. 

 Sori oblique, linear, single or binate, furnished with a 

 lateral indusium. 



Sect. 1. Orthophlebieai. Veins free, 



Ex. Asplenium, Linn., Diplazium, Sw., Scolopendrium, Sm. 

 Sect. 2. SymplophlebieiB. Veins variously anastomosing. 

 Ex. Neottopteris, J. Sm., Callipteris, Bory., Allantodia, 

 B. Br. 



Tribe V. — AsriDlE.K, ./. Sm. 

 Sori round, furnisbeil with an orbioulai', or btteral iute- 

 norly attached indusium. 



