86 TRANSACTIONS OF THE [Sess. lxxvi. 



Samolus Valerandi, Linn. Littorella uniflora, Aschers. 



Erigeron canadense, Linn. Helleborine longifolia, R. 

 Hydrocotyle vulgaris, Linn. & B. 



Anagallis tenella, Murr. Orchis incamata, Linn. 



Blackstonia perfoliata, Huds. Juncus effusus, Linn. 



Mentha aquatica, var. hir- Equisetum palustre, Linn. 

 suta (Huds.). 



The occurrence of these species in the different hollows 

 depends upon the relative amount of moisture present. 

 Practically pure societies of one particular species are not 

 uncommon. 



Kenfig Pool is situated within the limits of the Salix 

 association, and its general features have already been 

 described. On its sandy margin the vegetation met with 

 is mainly that of the damp hollows. A sheltered bay on 

 its landward side is rich in species, and the vegetation here 

 and there is of the marsh type. On the opposite shore, 

 which is exposed to frequent sand-blasts from the adjoining 

 dunes, very few plants occur. Space does not permit of a 

 detailed description of the flora and its distribution, but the 

 following list of commoner species will suffice to indicate 

 its character and composition : — 



Ranunculus peltatus, Polygonum amphibium, 



Schrank. Linn. 



Castalia alba, Wood. Rumex Hydrolapathum, 



Hydrocotyle vulgaris, Linn. Huds. 



Menyanthes trifoliata, Linn. Iris fcetidissima, Linn. 



Scutellaria galericidata, Alisma ranuncidoides, Linn. 



Linn. Eleocharis palustris, R. & S. 



Scutellaria minor, Huds. Carex leporina, Linn. 



Littorella uniflora, Aschers. Carex Goodenowii, Gay. 



Limosella aquatica, var. tenuifolia, Lej., was recorded as 

 occurring in great quantities on the sandy shores of the 

 pool in 1898, but it has not been observed in this locality 

 since 1908. Trees are practically absent from the mobile 

 dunes. On the northern limit of the fixed dunes sand 

 plantations occur, while the alder grows freely on the 

 banks of Kenfig river, and follows its course for a con- 

 siderable distance on the alluvium. Stunted, wind-pruned 

 specimens of Sambucus nigra are met with here and there 



