GTMNOGEAMME^. III. 



GYMNOGBAMMES:. 

 (a) Veins free. 



84. PTEROZONIUM, Fee, Gen. Ml. 178. 

 GYMNOGEAMMATIS sp., Auct. 



Sori non-indusiate, linear, radiato-furcate, approximate late- 

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

 the elongate receptacles seated towards the apices of the venules. 

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

 tiguous, free. 



Fronds simple, reniform, coriaceous, smooth, the fructifications 

 forming a broad band commencing a little within the margin. 

 Stipes terete. Ehizome short erect. Technically not very differ- 

 ent from G-ymnogramma, 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 

 PlatylometB. 



Ex. : P. reniforme, Fee. 



85. GYMNO GRAMMA, Desvaux, Serl. Mag. v. 304. 



GYMNOPTEBIS, Bernhardi in part; NEITBOGBAMMA, Pretl; CBTBEACH, 

 Pregl in part ; CALOMELANOS, Pretl ; As OGBAMMA, Link ; CEBOPTEBIS, 

 Iiink; HBCISTOPTEEIS, J. Smith; STENOGBAMMA, Klotzsch ; CHBYSODIA, 

 Fee; AEGTEIA, Fee; TBiSMEBiA,.F'e; CONTOGBAMMA, Fee; PLEUBOSOBTTS, 

 Fee; EBIOSOBTTS, Fee; DICBANODIUM, Newman; ASPLENII sp.,Auct.; 

 ACEOSTICHI sp., Auct.; HEMIONITIDIS sp., Auct.; GEAMMITIDIS sp., 

 Auct.; ScotopENDEii sp., Auct. ; POLTPODII sp., Auct. ; OSMU.YD.S: sp., 

 Auct. ; CETPTOGEAMMATIS sp., Hooker Greville; ? PHTLLITIS, Necker. 



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 

 costs 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 



