182 
PROCEEDINGS OE SOCIETIES. 
Asplenium viride (Hudson sp.). 
“ Kerry: Tore Mountain, KiUarney,” 1856, q. v. 
The following have been also recorded, hut specimens gathered in 
Ireland have not come under my notice, with one exception:— 
Cryptogramma crispa {Linn. sp.). Recorded from Down, Antrim, 
and Louth. 
Gymnocarpium JDryopteris (Linn. sp.). Recorded from Antrim, Mr. 
D. Moore. 
Lophodium rigidum (.Hoff ). Recorded from Louth by the Rev. Mr. 
Darby (q. v.) : query, introduced plants? 
The following species, natives of Great Britain, have not yet been 
recorded in Ireland, and, with the exception of the species queried (?), 
are not likely ever to be :— 
Gymnocarpium Robertianum , Woodsia Llvensis, Woodsia Alpina , 
Gystopteris Pichieana , Cystopteris myrrhidifolium (?), Lophodium calli- 
pteris (admitted into Dr. Mackay’s list, as he himself has informed me, 
by an error), JDryopteris abbreviata (?) ( I believe I met this at Omagh, 
hut cannot yet speak positively), Pseudathyrium Alpestre , Pseudathy- 
rium flexile , Amesium Germanicum (?), Am. septentrionale; and Lopho- 
dium uliginosum (pointed out to me living in the woods near Chissel- 
hurst, Kent, by Gb B. "Wollaston, Esq.). 
I have carefully abstained from admitting into this list any form of 
whose specific existence I am not convinced, such as Asplenium anceps 
(Lowe), first recorded from Killarney (where I have myself found it), 
by W. Andrews, Esq., and by him shown to be only a state of A. tri- 
chomanes; Lophodium nanum , extremely common on our mountains, but 
apparently only a state of Lophodium multiflorum, &c. 
The nature of the soil or rock on which the plants grow is but of 
little moment; careful notes of the distribution and growth of the ferns 
in distinct geological districts would lead to the conclusion that the only 
influence thus exercised relates more to the amount of shelter, moisture, 
and depth of soil mechanically dependent on geological formation than 
to the chemical constituents of the rocks. Numerically speaking, the 
species of ferns found on the bare granite ranges of the county of Dublin 
are equal to those of the more favoured and sheltered limestone districts 
of the Burren, and this becomes more striking when we except those 
plants of Lusitanian origin which occur in the latter county. Yet in 
the Eern Elora of the several districts there are features sufficiently 
marked to be of importance in the investigation of the sources whence 
the plants came, certain species of ferns in the several districts being 
more abundant, and growing in greater luxuriance, than the remaining 
species in that district, or than they themselves are found in other dis¬ 
tricts. 
Thus, excluding such generally diffused species as Pteris aquilina and 
Asplenium marinum, the characteristic ferns are as follows, in the several 
districts:— 
