200 
All these species have been found growing by myself, except those 
in parentheses ; and of these I have seen original plants. 
[have purposely omitted from this list all monstrous forms (with 
one exception, mentioned for the purpose of clearing up its history) ; 
for these I conceive out of place when treating merely of species, their 
only importance being in the study of Morphology. 
Of the species (recorded as Irish) which are absent from this list, 
Adiantum Capillus-Veneris, Asplenium acutum, Trichomanes radi- 
cans, Hymenophyllum Tunbridgense, Gymnocarpinm Dryopteris, 
Allosorus crispus, and perhaps I should add Cystopteris fragilis, are 
absent, owing to geographical causes; the first four being here 
southern and western species, as far as I can learn. Hymenophyl- 
lum Tunbridgense has been recorded in the Co. Wicklow, but on 
insufficient authority. Gymnocarpium Dryopteris is a rare northern 
species in Ireland, as also is Allosorus crispus, though I believe it 
formerly existed in the Co. Dublin, as Wade, in his ‘ Planta Rariores 
Hiberniz, published in 1804, records it, under the name of Pteris 
crispa, as “‘ occurring on very old walls about Rathfarnham, and on 
an old rock or stone as you go into Dalkey.” Both these localities 
are now destroyed; but he is generally very accurate, and the 
parsley-fern is a species that could hardly be mistaken for anything 
else; so accurate is he, that merely with his book [ have now, after 
the lapse of fifty years, found little difficulty in finding many of his 
stations for plants. Cystopteris fragilis the same author records as 
occurring near Tamlaght Hill. I have not succeeded in finding it 
there, though perhaps it exists. The district is clay-slate: I have 
always, in the West, found this fern on limestone. He may, perhaps, 
have mistaken some form of Athyrium Filix-fcemina for it, as I have 
known several persons to fall into the same error. The want of suit- 
able high mountains doubtless deprives this county of Asplenium 
viride, though I think it probable a search among the mountain glens 
behind Tamlaght Hill might discover this fern. Polystichum Lon- 
chitis, another dweller in high mountains, is doubtless absent from the 
same cause ; most of our mountain-ridges being entirely capped with 
bog, on which, in many places, even the heather refuses to grow. 
Hemestheum Thelypteris is absent, from want of a suitable locality, 
our bogs being too much exposed. Lophodium rigidum and L. spi- _ 
nosum have as yet been recorded only in one county each. L. Cal- — 
lipteris has not yet been found wild in Ireland. Gymnocarpium 
Phegopteris is one of the very rarest of Irish ferns. I cannot account 
