220 LICHENS. 



Chough Bock. Here the ground was oozy, and though a 

 great height above the sea, tiny streamlets were issuing 

 here and there, which as the path descended, accompanied 

 its slope, and on reaching the low ground joined a brook 

 that watered the valley of Play day. There was no fruit 

 on any of the fronds that we gathered, but we had the 

 good fortune to find an apothecia on a plant of another 

 species of Gyrophora, which we found adhering closely to 

 the rock. This was a large circular sooty patch of 

 wrinkled foliage, it was dry and very brittle, and as we 

 detached it from the stone with our large knife, it split 

 and cracked in various directions. This was the Burnt 

 Gyrophora (G. deusta, Plate XV., fig. 5) and when wet, 

 it was thin, transparent, and of a dark olive. A Scotch 

 friend furnished us with a specimen of the handsome 

 Fleecy Gyrophora (G. pellita, Plate XV., fig. 6), so 

 called from the dense black hairs which cover the under 

 surface, and which, as the broad lobes turn over on the 

 plane surface of the green frond, gives the appearance of 

 fur trimming to a lady's cloak. This lichen grew on the 

 rocks on Lord Breadalbane's Park, but it was where we 

 could not descend from the coach to obtain specimens. 



Closely allied with the Gyrophora group is that of 

 Umbilicaria, containing only one species, the famous 

 Tripe de Eoche (U. pustulata) so valuable as affording 

 sustenance to Canadian Hunters. It is beautiful in 

 appearance, greenish grey, having raised warts on its 

 surface, the colour becoming darker towards the margin, 

 which is fringed with black hairs ; the under side is brown, 

 and depressed in pits just where the upper surface is 

 blistered. Dr. Kichardson and his party were sustained 



