Proc. Roy. Socy. of Edin. ] 
[Vol. XXV. 
Fig. 107. — Salix repens growing in isolated dome-shaped tussocks on the Culbin 
sand-hills and encroaching over the domain of Ammophila arundinacea ; some 
of the latter may be seen growing out of the tussocks of Salix. The xero- 
philous habit assumed here gives it an entirely different appearance from that 
seen when growing on the wet moors. 
— . - - ---- • - i 
Fig. 108. — Loch Fiart, looking south-west, showing zone of Phragmites communis 
extending along the east shore. 
Mr George West. [Plate 54 . — Referred to on page 1021. 
