246 
LICHENS OF THE ISLE OF MAN. 
the Wall Cotyledon ( Cotyledon umbilicus ), with a dense cluster of 
small leaves amongst the blossoms, making a very curious, full, 
handsome spike ; and near Peel the pretty fern, the Sea Spleen wort 
(Asplenium marinum). But, as it was late in the season, there was 
little else amongst the flowering plants of more than ordinary 
interest. 
I therefore decided to concentrate my attention on the study of 
the Lichen Flora of that popular island, and henceforth looked at 
every lichen met with in my walks and rambles, and collected a 
sample of each, which was carefully wrapped up and labelled. So 
on my return home I was able to examine and name them, 
and from them the following list of some sixty species and 
varieties has been compiled. 
Several species seen in the island were unfortunately not 
amongst the specimens, and are, therefore, omitted from the list ; 
such as Physcia prunastri , Pertusaria communis , Parmelia physodes, 
and a few others. 
During our stay of three weeks in the island the weather was 
wet and stormy, which much interfered with my favourite study, 
as with finer weather more remote spots could have been reached 
and more minute inspection of some of the places visited might 
have resulted in additional specimens being found. But there 
were four bright exceptions—days of brilliant sunshine and cloud¬ 
less sky ; these we availed ourselves of to the full, going long 
journeys and examining the districts very carefully. 
I have never met with a list of the lichens of the Isle of Man, 
so in compiling this one I trust it will form a start, which others 
may add to, and so in time form a complete record of the lichen 
flora of the island. 
In the following list 1 have omitted all unnecessary reference to 
structural details, to the spermogones, &c., my object being to make 
the list as brief and generally useful as possible. 
The colours given are when the specimens are dry, as when wet 
the colours are often brighter, and the thallus a deeper green. 
They are named and classified according to Leighton’s “Lichen 
Flora of Great Britain,” 3rd edition, 1879, to which valuable 
November, 1893. 
