CHARACTERS OF TRIBES AND GENERA. 91 



Under these circnmstances, in my " Enumeration of 

 Genera," in 1841, I deemed it proper to unite Margiiiarla 

 witli GoniopMebium, and stated that " the peculiarities 

 of habit of the species forming this genus admit of 

 their being arranged under several sections, which may 

 with no great improjiriety be considered as genera." And 

 now (1875) finding that the species are variously arranged 

 by different authors under at least ten or twelve different 

 genera, although on bringing' them together according 

 to their natural habits, I find I cannot amend my original 

 arrangement, I deem it best to rank the sections as genera. 



In the " Species Filicum," Oonioplilehium and Marginaria 

 of Presl, are united and treated as a section of Polypodimn 

 in which are enumerated twenty-nine species, and in the 

 " Synopsis," the number is increased to thirty -nine ; but I 

 naust here observe that in consecjuence of determining 

 species from herbarium specimens great confusion pervades 

 the synonymy. 



The following are examples of the best known species, of 

 which fifteen have come under my notice in a living- state : — - 

 * Fronds simple. 



G. glauoophyllum {Kze). 



** Fronds pinnatifid. 



G. Scouleri (Hooh et Grev.), G. pectinatum (/. Sm. Bot. 

 Voij. Rerald), G. })atens (/. Sm. Bot. Voij. Herald), G. tri- 

 loba (CVtu.), {Synaminia triloba, P.resl), G. appendiculatum 

 (KloL), (v v.), G. plesiosorum (Kze.), G. pubescens {Hooh et 

 Grev.), G. surrucuohense {Hooh.), G. plectolcpis {HooJc), 

 (v v.), G. punctulatum (Hooh.), G. loriceum {Linn.), (vv.), 

 G. latipes (Lang, et Fisch.), G. Catherinte (Lang, et Fisch.), 

 (vv.), G. glaucum {Badd.), (v v.), G. harpeodes {Link), 

 (vv.), G. calpodes (Eze.), (v v.), G. Isetum {Badd.), (v v.), 

 G. vacillans {Tjinh), (vv.). 



