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X. L'mdjiia, a new Genus of Ferns. By Jonas Dryandcr t M. A, 



Libr. R. S. and F. L. S. 

 Read November 4, 17 94. 



? I M.1E ferns belonging to this genus have fo much the habit of 

 ■*■ Adiantum, that M. Aublet and Profcflbr Swartz have referred 

 to that genus the fpecies difcovered by them, though they ought, 

 according to the generic characters of Linnxus, to have been re- 

 ferred to P/er/s. In examining the Filices dorfiferte in Sir Jofcph 

 Banks's herbarium, for the purpofe of inveftigating the membranes 

 which cover the fructifications, I foon difcovered a great difference 

 between thefe fuppofed Adiantums and the genera of Adiantum and 

 Pter'ts. In Adiantum the fructifications, being diftinet fpots, are 

 covered by lunular membranes attached to the margin of the frond 

 and open towards the difk ; in Pteris the fructifications form a line 

 along the margin of the frond, and are covered by a linear membrane 

 fattened to the margin of the frond, and open towards the difk ; but 

 in this genus the fructifications form a line parallel with the margin 

 of the frond ; in fome fpecies clofe to it, in others more or lefs 

 remote from it ; but in all, the covering membrane is attached to 

 the difk within the line of fructifications, and opens towards the 

 margin of the frond. 



1 have named this genus from Mr. John Lindfay, an afliduous 



and 



