Flora of Scottish Lakes. 
141 
1909-10.] 
affording shelter to many rare species of water-fowl. In addition to the 
usual marsh and aquatic plants, which grow here very luxuriantly, this 
lake is becoming choked up with Anacharis Alsinastrum. — J. M‘A.] 
[Dowalton Loch, near Sorbie, was once an extensive sheet of water, but 
about sixty years ago it was almost emptied by cutting a deep outlet at its 
eastern end. Since then it has become overgrown with a dense growth of 
marsh plants, but cannot yet be said to he of much use agriculturally. — 
J. M‘A.] 
[South of Whithorn are numerous small lochs, becoming gradually over- 
grown with vegetation, amongst which several uncommon species of Carex 
may he found. Further south, and to the west of the Isle of Whithorn, 
there are several small lochs, in which grows the beautiful Chara poly- 
acantha. — J. M‘A.] 
Barhapple Loch is 4 miles east of Glenluce, on an extension of the 
same moor as Castle Loch, from which it is distant also about 4 miles. It 
is a circular loch, about \ mile across, with dirty, peaty water. The north 
side is bordered by a dense association of Phragmites communis (fig. 65), 
whilst the same plant occurs scattered over the peaty and muddy south 
shore. On the west side there is a considerable extent of marsh, dominated 
by Carex rostrata, C. filiformis, etc. On the east the shore is peaty or 
gravelly, and is bordered by a hank of peat from 4 to 6 feet high. Large 
tussocks of Molinia caerulea extend over the peaty portion of this shore, but 
where gravelly it is encroached upon by large tussocks of Juncus effusus 
(fig. 66). Drainage from the farm on the south appears to gain access to 
the loch, and the exposed mud on that side is very foul, large patches of it 
being coloured red by Porphyridium cruentum. Juncus supinus, var. 
subverticillatus, with all the flowers viviparous, was very abundant on this 
mud, growing in large, flat tussocks. At the same place a very robust form 
of Peplis Portula, growing in prostrate patches, was plentiful (p. 75). On 
peaty portions of the east shore a short, erect, caespitose form of Juncus 
supinus was common, and dwarf prostrate forms of Juncus bufonius were 
also abundant at the same place. There were very few mosses and no 
hepatics about the shores of this loch. No boat being available, the 
bottom could not be examined, hut, so far as I could tell, submerged plants 
were scarce. Besides the above mentioned, the following species were 
observed here : — Littorella lacustris, Callitriche hamulata, Comarum palustre, 
Montia fontana, Mentha aquatica, M. sativa, Spiraea Ulmaria, Juncus lampro- 
carpus, J. acutiflorus, Ranunculus Flammula, R. hederaceus, Myosotis 
palustris, Hydrocotyle vulgaris, Viola palustris, Galium palustre, Veronica 
seutellata, and Alisma Plantago. 
