1913-14.] BOTANICAL SOCIETY OF EDINBURGH 251 



here and there by rocky portions of the shore where a 

 different set of plants is in occupation. Here we find the 

 furthest outposts of terrestrial vegetation in the form of 

 lichens and mosses — the ffat crustaceous forms of the 

 lichens and little round cushions of Grimmia maritima, 

 Turn., occupying the otherwise untenanted rocks projecting 

 into the sea. free from competitors in their inhospitable and 

 uncoveted habitat. 



Occupying less advanced situations, and forming the 

 typical rock association, are found Glaux maritima. Linn, 

 Armaria maritima, Willi; Sagina procumbens, Linn 

 Coehlearia officinalis, Linn.: Plantago maritima, Linn 

 and Atriplex patvla, Linn. 



In many places the rocks are crowned with Ulex euro- 

 paeus, Linn.; while Sedv/m anglicum. Huds.. is usually 

 found near the edge of the turf. Among the rocks 

 which are furthest up the loch Festuca ■ Linn., 



occupies advanced positions towards the sea. and here 

 also Nardus striata, Linn., must be included among the 

 rock plants. 



3. SALT-MARSHES. — Here and there among the rocks or 

 coarse shingle are found small patches of the salt-marsh 

 type of vegetation composed of Glaux maritima, Linn.; 

 Juncus Gerardi, Loisel. ; J. articulatus. Linn.; Agrostis 

 alba, linn. ; Armeria maritima. Willd.; Atriplex pattda, 

 Linn.: and Sagina procumbens, Linn. 



These patches of salt-marsh plants are frequently below 

 high-water mark, which is indicated by a line of loose sea- 

 washed algae and other drift. Armeria and Glaux indeed 

 are occasionally found further towards the sea than the 

 highest attached algae. 



On the north side of the mouth of the Inverchaolain 

 Burn a flat alluvial point is covered with a salt-marsh 

 formation consisting of short turf mixed with An 

 maritima, Willd.. and SperguZaria media, Per-. 



Toward Point. — This portion of the shore, separated 

 from that which has already been described by an inter- 

 vening coast-line of 3 or 4 miles' length, deserves to 

 be treated separately on account of differences in the geo- 

 logical formation, and because of the appearance of several 

 species which are not found on the lochside. The sea 



