THE LICHENS OF THE COUNTIES OF DUBLIN 
AND WICKLOW. 
BY 
GREENWOOD PIM, m.a., F.1.s. 
[Read March 18, 1878.] 
The annexed list of Lichens is compiled chiefly from the cata- 
logue given by Dr. Taylor in the Flora Hibernica and that by 
Admiral Jones, published in the proceedings of the Dublin Natural 
History Society. This was submitted to the well-known Lichen- 
ologist, Mr. Isaac Carroll, of Cork, who has added a very large 
number of species, many of which have been detected since the 
time of Admiral Jones. Mr, Carroll believes that there are at 
least 140 species of lichens in Dublin and Wicklow still unre- 
corded, inasmuch as those in the Flora of County Cork amount 
to. about 290, while those of this district hitherto collected only 
number 150. 
The compiler wishes to take this opportunity of expressing his 
thanks to Mr. Carroll for his invaluable assistance in making out 
the following list, which doubtless would have been more perfect 
had Mr. Carroll explored this region as thoroughly as he has 
examined Cork and Kerry. 
Family. CoLLEMACEI. 
Tribe. Lichinei. : 
Genus. Ephebe. Fr. 
pubescens. Fr. Dublin Mts. W. Archer. 
Genus. Lichina. Ag. 
pygmea. Ag. Dublin. D. Moore. 
confinis. Ag. Dublin. D. Moore. 
Tribe. Collemei. 
Genus. Collema. Ach. 
pulposum. Ach. Probably frequent. I.C. 
var. tenax. Ach. Taylorin Flor. Hib. Near Dublin. 
=—C. limosum. Mr. Carroll believes that the true 
C. limosum Ach. is not Irish. 
nigrescens. LL. Dargle. Flor. Hib. 
