130 Proceedings of the Koyal Society of Edinburgh. [Sess. 



tions of Carex rostrata and Phragmites communis in the bays, there is no 

 great development of the httoral flora. Nearly everywhere the stony 

 shore has a thin, naiTow zone of Juncus articulatus, often mixed with 

 Ranunculus Flammula at the margin of the water (fig. 51). Besides those 

 already mentioned, the chief species of this loch are as follows : — Littorella 

 lacustris, Lobelia Dortmanna, Isoetes lacustris, Juncus fluitans, Potamogeton 

 praelongus, P. polygonifolius, P. lucens, Nymphaea lutea, Castalia speciosa, 

 Equisetum limosum, Iris Pseud-acorus, Mentha aquatica, Myosotis palustris, 

 Polygonum Hydropiper, Veronica scutellata, Hydrocotyle vulgaris, etc. 



Meikle Dornell Loch is a small circular pool i mile west of the last 

 mentioned, and connected with it by a burn. This little loch is sur- 

 rounded by low hills, and the water is bordered by peaty banks, so that no 

 shore intervenes between it and the moor. It is almost surrounded by a 

 belt of Phragmites communis. There are also a few plants of Scirpus 

 lacustris. A number of species common to the last-mentioned loch abound 

 here also. 



Loch Glentoo is 4 miles west of Castle-Douglas. It lies in a hollow 

 of the moor, and appears to have occupied a much larger area at one time, 

 if one may judge by the extent of low, marshy ground around it. The 

 margins of this loch are treeless and its water is rather peaty. From the 

 north and west shores outwards it is half overgrown with great beds of 

 Phragmites communis mixed with Scirpus lacustris, and about the shore 

 Carex rostrata and C. filiformis abound (fig. 52). At the south-west end 

 the growth of marsh vegetation is very dense, and merges gradually into 

 moor through an area of bog. Occasionally the shore is stony, but more 

 frequently only a peaty bank divides the water from the moor. The flora 

 resembles that of the next loch. 



Loch Bargatton occupies an open position on the moor | mile 

 south-west of the last mentioned. It is somewhat circular in outline, and 

 the water is peaty. The eastern shore is stony and rocky, and compara- 

 tively bare of plants. The western side is overgrown with dwarf Phragmites 

 communis, which also occurs in bays at other parts of the loch. 



This loch and Loch Glentoo, although at an elevation of only about 200 

 feet above sea level, resemble lochs of a highland type in their floras, because 

 of their exposed position on the open moor and their peaty water. Shore 

 rocks were sometimes freely coated with Grimmia apocarpa, Hypnum 

 cupressiforme, Orthotrichum rupestre, etc., whilst common bog mosses, 

 particularly various species of Sphagnum, were occasionally abundant. In 

 tiny pools upon the shores grew Chiloscyphus polyanthos, var. rivularis, but 

 otherwise Hepatics were scarce. The other plants more or less common to 



