1912-13.] BOTANICAL SOCIETY OF EDINBURGH 117 



It is interesting to notice how the various moorland 

 associations merge into one another according as the 

 environment changes, either as regards variation in 

 the amount of moisture present or in the thickness 

 of the peat. 



The Flora of the Streams and Marshes. 



Marshes and bogs occupy parts of the low-lying land, 

 which is subjected to lengthened periods of submergence 

 under water and to shorter periods of dry or less wet condi- 

 tions. The roots, rhizomes, and, in many cases, the lower 

 parts of the stems are under water, while the assimilatino- 

 parts are aerial. Many of the plants are such as can adapt 

 themselves to the varying conditions, partaking of such 

 characteristics as the prevailing state of the soil requires. 

 Reed swamps characterise such features as the reservoirs — 

 one example being found at the western end of Forrestburn 

 Reservoir. To the north-west of Lochill Farm, near Lady 

 Bell's Moss, there is a somewhat extensive marsh where the 

 vegetation appears to be zonally arranged. When this was 

 visited, the ground around was so sodden, owing to heavy 

 rains, that the marsh could not be thoroughly investigated, 

 but closer study will yet be made. The various streams 

 have many of the characteristic water plants. 



The following are among the plants found in the streams 

 and marshes : — 



Ranunculus Flam inula, Linn.; R. hederaceus, Linn.; 

 Caltha palustris, Linn.; Nv/pha/r Inteum, Sibth. et Sm. ; 

 Gardamine pratensis, Linn.; Lychnis Flos-cuculi, Linn. ; 

 Stellaria idiginosa, Murr. ; Montia fontana, Linn.; Poten- 

 tilla palustris,&Q,oY>.; Parnassia •palustris, Linn.; Callitriche 

 verna, Linn.; ft autumncdis, Linn.; Epilobium palustre, 

 Linn.; Galium uliginosum, Linn.; Valeriana officinalis, 

 Linn.; Senecio aquaticus, Hill; Lysimacltia thyrsifiora, 

 Linn.; Menyanthes trifoliata, Linn.; Myosotis palustris, 

 Hill; Veronica scutellata, Linn.: V. Ann (/all is, Linn.; 

 V. Beccabunga, Linn. ; Pedicularis sylvatica, Linn. ; 

 P. palustris, Linn.; Pinguicula vidgaris, Linn.; Mentha 

 aquatica, Linn.; Orchis maculata, Linn.; 0. la ti folia, 

 Linn.; Iris Pseudacorus, Linn.; Juncus, spp. ; Spa/r- 

 ganium ramosum, Curt.; #. simplex, Huds. ; Leirvna 



TRANS. BOT. SOC. EDIN. VOL. XXVI. 9 



