GYMITOaEAlIMll*. lli. 



§ GrYMNOaEAMMEiE. 

 (a) Veins free. 



84. PTEROZONIUM, Me, Gen. Ml 178. 



GyilNOGEAMMATIS Sp., Auci. 



Sort non-iudusiate, linear, radiato-furcate, approjdmate late- 

 rally, and at length confluent into a broad intramarginal zone ; 

 the elongate receptacles seated towards the apices of the renules. 

 Veins flabeUate or radiately furcate, equal, internal ; venules con- 

 tiguoua, free. 



Fronds simple, reniform, coriaceous, smooth, the fructifications 

 forming a broad band commencing a little within the margin. 

 Stipes terete. Bhizome short erect. — Technically not very differ- 

 ent from Qym/nogra/nvma, but the aspect of the plant is so peculiar, 

 that the parallel contiguous receptacles, from which result a broad 

 sub-marginal confluent sorus, may well be considered sufficiently 

 distinctive, This condition of the fructification does, in fact, 

 indicate an approach to the structure which occurs in the 

 Flatylomem. 



Ex. ; P. reniforme, "Fie. 



85. GTMNOGEAMMA, Desvanx, Serl. Mag. t. 304. 



Gtmwopteeis, Bemhardi in part; Netirogeamma, Fred; Cbteeach, 

 Preal in part ; Calomelanos, Fresl ; Awogeamma, Lmk ; Ceeopteeis, 

 Link; Hecistopteeis, J. Smith; Stenogeamma, Klotzsch ; Cheysouia, 

 F^e; Aegteia, JWfl; TEiSMEEiA,i*'^e; Coniogeamma, J'^e; Pleueosoetts, 

 F^e ; EEiosoEtrs, F6e ; Diceanoditjm, Newman ; Asplewii sp., Auct. ; 

 ACEOSTicHi ap., Auct.; Hemiowitidis sp., Auct.; Geammitidib sp., 



Auct ; SCOLOPBWDEII sp., Auct. ; POLTPODII Sp., Auct. ; OSMUND.a! Sp., 



Auct.; Cryptogeambiatms sp.y Hooker Qreville; ? Pkyllitis, iPiscAie)'. 



Sori non-indusiate, linear, sometimes elongated, simple or 

 forked i.e. bi-partite, oblique, often at length confluent ; the 

 receptacles elongate above or continued below the forks of the 

 veins. Veins simple or forked from a central costa, or the 

 costa sometimes indistinct; venules free. 



Fronds lobed pinnate or bi-pinnate, herbaceous or sub-mem- 

 branaceous, often farinosely ceraceous sometimes lanate beneath. 

 Ehizome short, erect, sometimes annual. — The characteristic fea- 

 ture of this genus is the forking of the linear sometimes much 



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