1909-10.] Flora of Scottish Lakes. 141 



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 be 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 be 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 dirt}', 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. iiliformis, etc. On the east the shore is peaty or 

 gravelly, and is bordered by a bank 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, cajspitose 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, but, so far as I could tell, submerged plants 

 were scarce. Besides the above mentioned, tlie 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 

 scutellata, and Alisma Plantago. 



