ASPIDIE^. Ixxxiii. 



Fronds robust, coriaceous, pinnate. Ehizome stort, thick, 

 erect. — In one division of this genus, the venules (except the 

 lowest) are all anastomosed. In the other, several of the lower 

 venules are free ; indeed some specimens of C nobile, belonging 

 to the latter group, are scarcely at all anastomosed. 

 § Cyrtomium. — Veuules generally anastomosed. 

 Ex. : C. falcatum, Fresl. \ C. caryotideum, Preal. 



§ AmbUa. — Upper venides only anastomosed. 

 Ex. : C. nobile (Aspidium,iSeHccA.^ | C. juglandifolimn (Amblia, Fresl.J 



* * Veins connivently anastomosing. 

 lie. CYCLODITJM, Fresl, Tent. Fterid. 85. 



ATfisocAMPiUM, PreaJ; Asproii 5^.,Auci.; Nepebodii sp., J. Smith ; 



POLTPODII Sp., .42tei.; POLTBTICHI Sp., Pt'CS? ; GONIOPTBBIDIS Sp., J'^e. 



Sori indusiate, globose ; the receptacles medial on the trans- 

 versely anastomosed venules. Indusium, orbicular, peltate. Veins 

 pinnate, from a central costa, straight or zigzag j vemiles con- 

 nivently anastomosing in arcuate or angulate areoles, sometimes 

 producing from the angle an exourrent veinlet, which in the 

 sterile fronds is either free or unites with the next pair of venules. 



Fronds, thick, herbaceous, robust, pinnate; the fertile con- 

 tracted. Rhizome sub-erect. — This genus is analogous to Ne- 

 pli/rodiwm among the reniform Aspidiece, and to Qoniopteris 

 among the PolypodietB ; but is somewhat peculiar in its robust 

 fronds, of which the fertile are contracted. It is also nearly 

 related to Cyrtomium, differing in having the transverse anasto- 

 mosed venules, instead of the exourrent usually free veinlets, 

 soriferous. 



Ex. : C. confertom, Presl. I C. meniseioldes, Presl. 



C. abbreviatum, Fresl. \ C. Cunmigianuin(Aiiisocampium,Pj*.^ 



117. POLYSTICHUM, Soth, Tent. Fl. Germ. iii. 69 

 (reduet) : SchoU, Gen. Fl. (t. 9). 



HtpopeIiTis, Sichard; Aspidium, Sioartz, in part: Auet j BTraiOHBA, 

 Baddi; HEMlGONiirii, J. Smith; Peltochljena, F4e; Ctclopeltis, 

 J.Smith i Hemicabdioit, J5Ve ; Tbctaei^ sp,, CiwaniUes ; Nephkodii 

 sp.,Fresl; Lastee.^ sp.,Aud;.; PoltpODII sp., ^M(rf. 



Sori indusiate, globose j the receptacles medial or rarely termi- 



h2 



