112 TRANSACTIONS OF THE [Sess. lxxvii. 



A. Ptarmica, Linn. ; Hieracium Pilosella, Linn. ; Cam- 

 panula rotundifolia, Linn. ; Veronica officinalis, Linn. ; 

 Euphrasia officinalis, Linn. ; Tliymus Serpyllum, Linn. ; 

 Plantago lanceolata, Linn. ; Rumex Acetosa, Linn. ; R. 

 Acetosella, Linn. ; Urtica dioica, Linn. ; Orchis maculata, 

 Linn. ; Habenaria viridis, Br. ; H. bifolia, Br. ; Briza 

 media, Linn. ; Pteris aquilina, Linn. ; Oiihioglossum vul- 

 gatum, Linn. ; Botrychium Lunaria, Sw. 



Vegetation of Dolerite Sills. — As mentioned under 

 Geology, a characteristic feature of the district is the 

 number of transgressive sills of quartz-dolerite, the ridges 

 ranging in height from 700 to over 900 feet. The rounded 

 tops of these sills are clothed with grass which is usually 

 shorter and greener than that of the adjoining region — for 

 instance, in places, damp reedy grassland gives way to a 

 dwarf grass covering with drier conditions, having the 

 following plants — the list being made from one such case 

 in the neighbourhood of Harthill : — Potentilla Tormentilla, 

 Scop. ; Galium saxatile, Linn. ; G. verum, Linn. ; Scabiosa 

 Succisa, Linn. ; Campamda rotundifolia, Linn. ; Thymus 

 Serpyllum, Linn. ; with Vaccinium Myrtillus, Linn., and 

 Calluna vulgaris, Hull, on dry mounds. 



The following is a list from the dolerite knoll on the 

 north side of the Lilly Loch. The plants are similar to 

 those given for the basaltic hills of the Edinburgh district, 

 and the hills of the Carboniferous area of Fife and Kinross : 1 

 — Trifolium repens, Linn. ; T. pratense, Linn. ; Lathyrus 

 pratensis, Linn. ; Potentilla Tormentilla, Scop. ; Galium 

 verum, Linn. ; G. saxatile, Linn. ; Scabiosa Succisa, Linn. ; 

 Achillea Millefolium, Linn.; A. Ptarmica, Linn.; Cam- 

 panula rotundifolia, Linn. ; Rumex Acetosa, Linn. ; 

 R. Acetosella, Linn. ; Festuca ovina, Linn. ; Agrostis, spp. ; 

 Poa pratensis, Linn. ; Anthoxanthum odoratum, Linn. ; 

 with Ulex Europaeus, Linn., Vaccinium Myrtillus, Linn., 

 Calluna vulgaris, Hull, and Erica cinerea, Linn., in 

 occasional small patches ; and Poly gala vulgaris, Linn., 

 Cnicus lanceolatus, Willd., Centaurea nigra, Linn., 

 Euphrasia officinalis, Linn., Plantago lanceolata, Linn., 

 and Hieracium, spp., at the foot of the escarpment. 



1 " Botanical Survey of Scotland — Edinburgh District"; "Botanical 

 Survey of Scotland— Forfar and Fife." 



