1914-15.] BOTANICAL SOCIETY OF EDINBURGH 355 



running into Findhorn Bay. Each has a distinctive char- 

 acter in the flora of its banks. 



The most southerly contains much iron hydroxide. The 

 plants by it are low-growing. The habitat partakes some- 

 what of the characters of both fixed dune and salt-marsh, 

 which are both seen pure near by. The sandy substratum 

 is apparently exposed to periodic floods. Carex arenaria, 

 Linn., mingles with the fleshy-red Statice maritima ; 

 Glaux maritima; Plant a go Coronopus; and Littorella 

 unirlora. Centaurium vulgare, Rafn., in which the tufted 

 or cushion growth is strikingly carried out in the branches 

 of the inflorescence, is conspicuous. Sagina nodosa, Fenzl., 

 is also abundant, and Sagina procumbens, Linn., is frequent. 

 Radiola linoides, Roth., is locally dominant, branching 

 abundantly just at the surface of the soil. 



In one small area, farther down the burn, come together 

 TriglocJtin maritimum; Euphrasia officinalis, Linn.; 

 Fi.lago germanica, Linn.; Erica Tetralix, Linn.; Erica 

 cinerea, Linn. ; and Juncus squarrosus. 



Another grouping in this quarter is of Statice maritima; 

 and Cochlear ia officinalis; with Lychnis alba, Mill.; 

 Atriplex patula, Linn. ; and Rumex Acetosella, Linn. 



Where the littoral marsh between this and the next 

 streamlet passes westward into sand grow a dwarf Chrys- 

 anthemum segetum, Linn.; Senecio Jacobaea, Linn.; 

 Sonchus asper, Hill ; Solanum Dulcamara, Linn. ; and 

 Salix aurita, Linn. 



At the second burn Erica cinerea mingles with Plantago 

 Coronopus. On the sandy flats, widening out here to the 

 northward, is a curious patch, dry in dry weather, with 

 shrubs of Betula tomentosa, Reith. et Abel ; Alnus rotundi- 

 folia, Mill. ; and Salix aurita, with Scdix repens, Linn. ; and 

 Carex Goodenotvii subdominant. Also present are tussocks 

 of Erica Tetralix and Juncus squarrosus and Potentilla 

 Anserina, Linn. 



The most northerly burn comes from the Binsness pine 

 wood and passes through a strip of the birch wood. The 

 soil in both woods here is sand ; but the ground vegetation 

 differs. Under the birches are long Erica cinerea and 

 shorter Calluna vulgaris, with the mosses Hylocomium 

 squarrosum, B. et S. ; Thuidium tamariscinum, B. et S. ; 



