128 TRANSACTIONS OF THE [Sess. lxxvii. 



sand, and among the plants here to be met with are : — 

 Sagina maritima, Don ; 8. nodosa, Fenzl ; Samolus 

 Valerandi, Linn. ; Erythraea littoralis, Fries ; Scirpus 

 pauciflorus, Lightf . ; Blysmus rufus, Link ; Carex glauca, 

 Scop. ; G. extensa, Good. ; G. Oederi, Retz. ; Funaria 

 ericetorum, Dixon ; Br yum atropurpureum, Web. et Mohr, 

 etc. This zone merges into a marshy tract formed by 

 copious drainage from the higher ground; and here all 

 maritime influence seems to be neutralised. The plant- 

 associations of this boggy ground are very variable in 

 character within areas of quite limited size. They com- 

 prise in the main fresh-water marsh and Sphagnum bog, 

 with, in places, a development of Scirpus- Eriophorum bog, 

 with Potentilla Tormentilla, Scop. ; Drosera rotundifolia, 

 Linn., Galluna vulgaris, Hull (sparingly) ; Erica Tetralix, 

 Linn.; Myrica Gale, Linn.; Narthecium ossifragum, 

 Huds. ; Scirpus caespitosus, Linn. ; Eriophorum vaginatum, 

 Linn. ; etc. Finally, at the inner margin of the raised 

 beach we reach old sea-cliffs, with shaded, dripping rocks, 

 rich in ferns and mosses, and sometimes thinly clothed 

 with trees, principally birch, mountain ash, and oak. 



On the western side of the island, at Blackwater Foot, 

 there is a small tract of blown-sand. The following is a 

 list of the characteristic and more interesting plants of the 

 dunes : — Brassica monensis, Huds. ; Viola Gurtisii, 

 Forster ; Gerastium tetrandrum, Curt. ; Arenaria peploides, 

 Linn. ; Erodium cicutarium, L'Herit. ; Lotus corniculatus, 

 var. crassifolius, Pers. ; Prunus spinosa, Linn. ; Rubus 

 caesius, Linn. ; Potentilla Anserina, Linn. ; Rosa spinosis- 

 sima, Linn. ; Sedum anglicum, Huds. ; S. acre, Linn. ; 

 Eryngkim maritimum, Linn. ; Daucus Garota, Linn. ; 

 Galium verum, Linn. ; Filago germanica, Linn. ; F. 

 minima, Fr. ; Senecio sylvaticus, Linn. ; Jasione montana, 

 Linn. ; Galluna vulgaris, Hull ; Convolvulus Soldanella, 

 Linn. ; Euphrasia brevipila, Burnat et Gremli ; Thymus 

 Serpyllum, Linn. ; Atriplex laciniata, Linn. ; Polygonum 

 Roberti, Loisel. ; Rumex Acetosella, Linn. ; Gar ex arenaria, 

 Linn. ; Ammophila arenaria, Link ; Aira praecox, Linn. ; 

 Agropyron junceum, Beauv. ; Pteris aquilina, Linn. ; 

 Gatharinea undulata, Web. et Mohr; Polytrichum juni- 

 perinum, Willd. ; Ceratodon purpureas, Brid. ; Dicranum 



