DUBLIN NATURAL HISTOEY SOCIETY. 
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It grows most luxuriantly, and in a greater state of development at Be- 
ragh, county of Tyrone, than in any other locality in which I have met 
with it. 
Bryopteris Borreri (JVewm .). Borrer’s Fern. 
General, and generally diffused; affects more exposed stations and 
higher altitudes than the last. 
These two species are among the more characteristic of the eastern 
species. 
Athyrium filix fcemina {Linn. sp.). Lady Fern. 
General, and generally diffused. 
After a long and careful study of this, one of the loveliest of our 
native ferns, I cannot make out more than the one species of this fern 
in Ireland, of which forms at times occur which are identical, apparently, 
with convexum , incisum , and molle of the Floras. Whether the original 
types of these divisions were specifically distinct or not, I do not pretend 
to judge, hut in Ireland we have hut one species. I should except a small 
form (?) of this species, which I obtained some years ago at Ardmore, 
county of Waterford, growing on the sea cliffs, hut which I have not 
had sufficient means of examining, to enable me to judge of its claims 
to specific distinction. 
Asplenium lanceolatum {Hudson). 
Cork : Kinsale, Mrs. J. Beete Jukes, 1856, q. v 
The only Irish specimen I have ever seen was that noted above. I 
have recently seen the plant growing luxuriantly in Cornwall, near 
Polperro. 
Asplenium adiantum-nigrum {Linn.). Maiden-hair Spleenwort. 
General. 
A commonly diffused, though local plant, occurs on rocks and earth- 
hanks as its natural habitat; I have met it everywhere. In the north 
and east it is generally more local than in the south. 
Asplenium acutum {Bory MSS.). Killarney Spleenwort. 
Kerry : Tore Mountain and other places near Killamey, not uncom¬ 
mon, J. B. K., 1856. 
Kq one who has seen this plant growing wild, or authentic specimens 
under cultivation, would for one moment entertain the idea of this and 
Asplenium adiantum-nigrum being the same species; their habits are dis¬ 
tinct, and constantly distinct, so much so that I have known persons 
who were not botanists readily point out the difference between the 
two species. The confusion relative to the two has, I conceive, arisen 
from the fact of a form of A. adiantum-nigrum existing abundantly in 
various parts of the country; amongst others atMucruss, Killarney, which 
is extremely difficult to distinguish from the printed description of this 
plant, but scarcely to be confounded with the plant itself. I have no 
