GENEBA OP TEENS : 



nal on the venules. Indusium orbicular, peltate. Veins pinnato- 

 furcate or simply forked, from a central costa ; venules free ; the 

 lower anterior one usually, sometimes more, fertile. 



Fronds simple pinnate or bi-tri-pinnate, rigid, coriaceous, the 

 margins usually mucronato-serrate. Khizome short, thick, erect. 

 An extensive genus, very well marked by technical characters. 

 Probably Cyclopeltis should be included. The original Polysti- 

 chum of Both, Aspidium of Swartz, and Tectaria of Cavanilles, 

 were all proposed about the same date, and intended to separate 

 the indusiate species at that time referred to Polypodium, from 

 among the typical non-indusiate group. In the disposition of 

 the two former of these names, long since made by Schott and 

 adopted by Presl, we entirely concur ; but it is to be regretted 

 that either the expressive name of Cavanilles, or the still older 

 synonym of Adanson, was not used by Presl, instead of the 

 more modern inexpressive one of Bory, for the group now known 

 as Lastrea. The latter name having been, however, employed so 

 long ago in the arrangements both of Presl, and J. Smith, on 

 which modern views of classification are mainly based, and the 

 group being so extensive that the substitution of another generic 

 name would involve multitudinous changes, it is doubtless better 

 now to acquiesce in Presl's nomenclature, both as to the appli- 

 cation of Lastrea to the free- veined reniform Aspidieee, and of 

 Nephrodium to those having anastomosing veins. 



Hypopeltis. Pinnae and pinnules continuous with the rachis. 



Ex. : P. Lonchitis, Roth. 



P. acrostichoides, Schott. 

 P. aculeatum, Roth. 

 P. obtusum, J. 8m. 

 P. coriaceum, Schott. 



P. mucronatum, Presl. 



P. pun 

 P. flexu 



ungens, Presl. 



. m, Philippi. 

 P. multifidum (Aspidium, Mett .) 

 P. stenopteris (Aspidium, Kze.) 



Cyclopeltis. Pinnae articulated. 

 Ex. : P.semicordatum(Cyclop.J.Sm.) | P. Presliana (Cyclopteris, J. SmJ 



(c) Indusium reniform, affixed at the sinus. 



* Veins reticulated. 

 118, FADYENIA, HooJcer, Gen. Fil. t. 53. (non Endl.) 



ASPLBKII sp., And. ; ASPIDII sp., Auct. ; POLTSTICHI sp., Anet. 

 Son indusiate, oblong 'rotundate, large, uniserial on each side 



