1912-13.] BOTANICAL SOCIETY OF EDINBURGH 127 



Sedv/m anglicum, Huds.: Drosera rotund i folia, Linn.; 

 Lythrum Salicaria, Linn.; Apium graveolens, Linn.; 

 Oenanthe crocata, Linn. ; Eupatoriam cannahin a.m. Linn. ; 

 Aster Tripcliwm, Linn.; Orepis paludosa, Moench ; 

 Armaria maritima, Willd. ; Anagallis tenetta, Murr.; 

 Eryihraea littoralis, Fries; Menyanth.es trifoliaia, Linn. ; 

 Pedicular''* palustris. Linn.; Pinguicula vulgaris, Linn.; 

 P. lusitanica.'Linn.: Myrica Gale.lAnn.: Orchis maculata, 

 Linn.: Habenaria vireseens, Druce; Iris Pseudacorus, 

 Linn. : Nariheciv. m ossifragv/m, Huds. ; Sdrpus paudflorus, 

 Lightf . ; S. caespitosus, Linn.; Schoenus nigricans, Linn.; 

 Garex helodes, Link: C. Oederi. Retz. : SdagineUa selagin- 

 oides, Link: Blindia acuta. B. et S. ; Campylopus atro- 

 • <. De Not : Dicranv/m Bonjeaui. De Not. : Grimmia 

 maritima, Turn.; G. puZvincUa, Smith: TricJtustumum. 

 vrispulv/m, Bruch ; Ulota phyUcmiha, Brid.; Fwnaria 

 ericetorum, D'mon: Bryv/m atropv/rpureum, Web. et Mohr; 

 Hypnum sarmentusum. Wahl. : Adelanthus decipiens 

 (Hook.), Mitt. : Scapania Irrigua (Nees), Dum. 



Some light will be thrown on the llorula of this shore by 

 a brief sketch of the principal types of plant habitat, and 

 corresponding plant-associations, which may be met with 

 in many places by crossing the raised-beach platform from 

 the tidal rocks at its seaward edge to the old sea-cliffs at 

 its inner margin. Immediately above the tidal zone are 

 outcropping rocks which support only a scanty vegetation 

 (mainly cryptogams ). but one which is of considerable 

 interest ecologically. 1 



These rocks and the sandy or muddy ground about 

 them constitute a narrow belt to which the maritime species 

 are largelv restricted. Where the ground is muddv and 

 subject to tidal influence, it approximates closely to salt- 

 marsh, and yields the halophytes and other maritime species 

 mentioned. At other points, the soil is a wet. muddy 



1 The vegetation of the barer rocks La practically restricted to lichens, 

 prominent among which are the following species : — Physcia aquila, 

 NyL ; P. purietina, De Not. ; Lecanora parella, Ach. ; L. aira, Ach. ; 

 ■aria mourn, Whlnb. ; Lichina amfinis, Ag. ; etc. In the colon- 

 isation of these maritime rocks, the lichens are closely followed by 

 several brvophytes, e.g., the mosses, Grimmia ptUvinata, Sm. : G. apocarpa, 

 Hedw. : G. maritima, Turn. : Ulota phyUantha. Brid. ; and the hepatics, 

 Metzgeria furcata (Linn.), Dam., and Frullania Tamarisei (Linn.), Dum. 



