1912-13.] BOTANICAL SOCIETY OF EDINBURGH 115 



parvifiorum, Schreb. ; Anthriscus sylvestris, Hoffm. : 

 Galium Aparine, Linn.; G. cruciata, Scop.; Bellis 

 perennis, Linn.; Chrysanthemum Leucanthemum, Linn.: 

 Tussilago Fa/rfara, Linn.; Senecio vulgaris, Linn.: S. 

 Jacobaea, Linn.; Cnicus palustris, Willd. ; C. arvensis, 

 Hoffm.; C. lanceolatus, Willd.; Taraxacum officinale, 

 Weber; Myosotis arvensis, Hill: Veronica Chamaedrys, 

 Linn.; Rhinanthus Crista-gaUi,IAnii.; Prunella vulgaris. 

 Linn.; Ajuga reptans, Linn.: Plaatago major, Linn.: 

 Rumex crispus, Linn.; Polygonum aviculare, Linn.: 

 P. Persicaria, Linn. ; Equisetum arvense, Linn. 



3. Grass Heaths. — There is always present a certain 

 amount of peat, and according to the amount of peat and 

 water there is variation in the heath. In his survey of 

 the vegetation of the Rivers Eden, Tees, Wear, and Tyne, 

 F. J. Lewis distinguishes between two well-marked types 

 of heath — ■ 



(1) Molinia Heath — having wet conditions of soil with 

 peat and water in abundance, the plants being mainly 

 sedges, grasses, and a few heather plants. 



(2) Nardus strieta. Heath — where the soil is dried and 

 better drained, with peat less abundant, the covering being 

 often very thin. 



Both of these types may be distinguished in the parish. 

 Nardus strieta, for example, occurs associated with 

 Calluna on the sloping, dry ground of Jersay Moor, occur- 

 ring in somewhat extensive patches. It is also found in 

 many places of the moorlands associated with Vaccinium 

 Myrtillus, but the grass usually associated with Vacciniv/m 

 is the dry, wiry Deschampsia fiexuosa which forms dense 

 tussocks, and is dominant on most of the heaths of the 

 parish. Molinia varia is characteristic of the low-lying, 

 flat, and badly drained parts of the moors. The following- 

 are the chief plants found : — 



Under dry conditions : Nardus strieta, Linn. ; Des- 

 champsia fiexuosa, Trin. ; Agrostis vulgaris, With.; Poten- 

 tilla Tormentilla, Scop.; Galium saxatile, Linn.; 

 Vaccinium Myrtillus, Linn. ; Calluna vulgaris, Hull : 

 Erica Tetralix, Linn. ; Luzula campestris, DC. 



Under wet conditions : Molinia varia, Schrank ; Des- 

 champsia caespitosa, Beauv. ; Lotus uliginosus, Schkuhr ; 



