224 THE FRESH-WATER LOCHS OF SCOTLAND 
rocks also are frequently overgrown with Bryophytes common to the 
district. 
Loch Valley, as already indicated, is adjacent to the last-mentioned 
and receives its outfall. The physical and botanical features are 
similar to those of the adjacent lochs already described, but it has in 
addition Carex filiformis and Menyanthes trifoliata. 
Loch Narroch is quite a small circular sheet of water at the east 
end of Loch Valley, which in physical and botanical features it 
resembles. The marginal submerged rocks were covered with remark- 
able quantities of Algae, chiefly of the genera Batrachospermum, 
Ulothrix, Zygogonium, Zygnema, and Mougeotia. 
Round Loch and Long Loch of Glenhead are both to the south 
of Loch Valley ; they are, however, at a lower elevation and smaller. 
They much resemble the foregoing lochs, and, so far as I could glean, 
are of little botanical interest. 
Loch Dee, which is 1| miles long and f mile wide, is the largest 
of this series of lochs. It is situated at an elevation of 739 feet above 
the sea, amidst wild and lonely scenery, about five miles south of 
Loch Enoch. Although at a lower elevation, it is similar in general 
features to that and the neighbouring lochs, excepting that the sand of 
its shores is not white, but of a brownish tinge ; the water also differs in 
being somewhat more peaty. The flora is extremely poor and presents 
nothing uncommon to the district. Bryophytes abound on the shores 
and on the exposed rocks. Very conspicuous also are the lichens which 
cover numerous rocks by the shore ; the most plentiful of these are : — 
Platysma glaucum, Cetraria muricata, Parmelia lanata, P. omphalodes, 
Alectoria jubata, Sphaerophoron coralloides, and Lecanora tartarea. 
Dry Loch, Round Loch, and Long Loch of the Dungeon.— These 
are small sheets of water, each a few hundreds of yards long, and 
they are all connected by a stream which first flows out of the Dry 
Loch, that being the highest of the three ; this stream ultimately 
becomes the river Dee. Their shores are stony or peaty, and the 
water is slightly peaty but clear. These lochs are situated at the 
highest and wildest part of the glen, between Dungeon Hill and 
Craignaw, and the scenery around is extremely fine. They have no 
feature of botanical interest beyond a number of such plants as are 
contained in the other lochs of the immediate neighbourhood. 
Loch Trool is 246 feet above sea-level, and is 1^ miles long by 
J mile wide. It is approached from Loch Dee through a narrow, 
rugged, and trackless pass about three miles long. This loch affords 
a splendid piece of highland scenery, which is probably unequalled 
south of Perthshire. Mountains rise from the shores almost through- 
out its whole length, their lower slopes being clothed with either 
coniferous or deciduous-leaved trees. This loch much resembles 
