137 
Saxifraga rivularis, Epilohium anagallidifolium, Arabis 
petrsea, &c. 
The party now descended into the valley of the Dee, 
where, having extemporized a heather bed, sheltered by 
large stones, they passed the night. The following morn- 
ing they started early to ascend Ben Mac Dhui, and in two or 
three hours, after very hard walking over huge boulders 
and broken rocks, reached the sloping and gravelly top 
which led them gently upwards to the summit. Here 
Luzula arcuata was the principal plant; mingled with 
stunted specimens of Luzula spicata, Garex rigida, and 
silene acaulis. After resting a short time, they proceeded 
over a gently sloping gravelly headland towards Cairngorm, 
and ere long a change came over the character of the scene, 
for numerous little rills of water made their appearance, fresh 
from the melting snow, each boulder stone being covered with 
mosses and jungermannise of all shades of colours from light 
green to dark purple. Among others the glaucous green 
tufts of cephalozia albescens and anthelia julacea, the large 
purple patches of scapania uliginosa and Nardia compressa, 
the rich brown beds of Polytrichium sexangulare and dark 
green and dull purple of Bryum Duvalii, and black Androea 
nivalis were especially remarkable. The snow field was now 
crossed, and a stream of water appeared sufficiently 
large to debar the party crossing it with impunity; 
the course of this stream was pursued, and the shelter 
stones near Loch Avon discovered, where they passed an- 
other night. The next morning they started for Braemar 
by Glen Derry. Near the Corrie of Etichan were found 
Hieracium alpinum, Tofieldia palustris, Tetraplodon 
mnioides, &c. 
On Wednesday (July 19) Glen Callater was visited. The 
principal plant noticed being a curious variety of Helianthe- 
mum vulgare, the base of the petals being blotched with 
dark orange spots. Sphagnum subsecundum, Salix lanata. 
