368 TRANSACTIONS OF THE [Sess. lxxix. 



astium viscosum, Linn. ; Sagina procumbens, Linn. ; 

 Sagina nodosa ; Potentilla Anserina ; Galium palustre ; 

 Bellis perennis ; Senecio Jacobaea ; Cnicus lanceolatus, 

 Willd. ; Erica cinerea ; Erica Tetralix ; Myosotispalustris ; 

 Prunella vulgaris ; Rumex Acetosella ; Filago germanica ; 

 and Radiola linoides. In the damper places Hydrocotyle 

 vulgaris is common, so are Carex Oederi, Eetz. ; Drosera 

 rotundifolia ; Eriophorum angustifolium ; Juncus squar- 

 rosus ; Eleocharis palustris ; and Polytrichum commune. 



The photograph (Plate LVII) shows the luxuriant growth 

 of one of the clumps of cotton grass in the central area 

 where the vegetation is densest. 



This loch, like Buckie Loch, is a favourite collecting- 

 ground for entomologists, and the relations of the larvae 

 and other stages of the insects, some of them rare, with the 

 vegetation of the most densely grown parts, suggest studies 

 of interest to the botanist. 



On the drier outskirts of the marsh are found Carex 

 arenaria in abundance, occasional Cnicus r pratensis, Willd., 

 and much of the fungus. Lachnea hirta (Schum.), Gillet. 



In some ways the most notable plant obtained in South 

 Loch is Lycopodium inundatum, Linn. Here it grows at 

 the bases of little mounds which appear scattered over the 

 transitional space to fixed dune, and just where the darker 

 and damper sand passes into the whiter sand that crowns 

 the mound. The vegetation on the top of the mound is 

 usually close-growing Salix repens ; Sagina nodosa ; and 

 Rumex Acetosella. 



Distribution of the Flora in Area, of the Culbin 

 Sandhills Proper. (See Map II.) 



Lines drawn across the plan of the Culbins reveal inter- 

 esting transitions in the flora. One drawn from the sea, 

 north of Buckie Loch, passes over white dune, with 

 Ammophila arenaria, through dune-marsh flora, a dune- 

 grassland, or dune-pasture flora, and the various comming- 

 lings of these with floras of fixed and shifting dunes about 

 Buckie Loch ; then in one direction over bare shifting 

 dune, or dune with Ammophila arenaria, to the South 

 Loch with its mingling of typical marsh with drier floras ; 

 then to shifting dune and grey dune carrying Ammophila 



