146 



Proceedings of the Royal Iriah Amdeniy. 



hillocks, and out of the reach of the sea-water, thus showing its 

 character as a psammophile rather than halophile plant. The only 

 list of plants we made here (in the month of December) is as follows, 

 in order of relative abundance : — 



Within our area, the salt-marsh flora forms but a subsidiary 

 feature of the vegetation, and is best seen in marshy fields between 

 jMerrion and Blackrock, especially on the borders of drains there. 

 But even here grazing and building have so reduced the flora that 

 only remnants of a halopliile vegetation are now in occupation of the 

 ground, and they call for no detailed treatment. 



The coast from Blacki'ock to Killiney is formed of rough, granite 

 rocks. These yield in general but a limited flora, on account of their 

 dry and massive nature, and the fact that houses and gardens occupy 

 most of the available space. On the high declivities and cliffs of Bray 

 Head, formed of slates and quartzites, the vegetation is undisturbed, 

 and forms a mixed saxicole and halophile association. On the rocks 

 may be seen, of maritime plants, Lavafera arhorea^ Spergularia rupestris, 

 Crithmum maritimum^ JSiiphorhia p>ortlandica, and Aspleiimm marinum, 

 growing with the familiar profusion of Scurvy-grass, 8ea- Campion, 

 Sea-Pink, Scentless May-weed, and Sea Plantain. The plants of 



Triticum junceum. 

 psamma a hex aria. 

 Eryngiura maritimum. 

 Euphorbia Paralias. 

 Cakile maritima. 

 Cerastium tetraudi^um. 

 C. semidecandrum. 

 Taraxacum officinale. 

 Hypochaeris radicata. 

 Agrostis alba. 



Cnicus arvensis. 

 Leontodon autumnalis. 

 Poa pratensis. 

 Plantago lanceolata. 

 Matricaria inodora. 

 Holcus mollis. 

 Pestuca ovina. 

 Senecio vulgaris. 

 Sonchus oleraceus, and 

 A small Agaric. 



The Salt-Marsh Association. 



The Rock and Cliff Association. 



