76 



VEGETATION OF THE PEAK DISTRICT 



[oh. 



Ulmus glabra 



( = U. montana) 

 Sisymbrium officinalis 

 Geum nrbanum 

 Rubus caesius 

 Rosa arvensis 

 Vicia sepium 

 Acer campestre 

 Sauicula europaea 

 Caucalis Anthriscus 



Chaerophyllum temulum 

 Cnicus heterophyllus 

 Phragmites communis 

 Arrhenatherum elatius 



( = A. avenaceum) 

 Brachypodium gracile 

 Arum maculatum 

 Allium ursinum 

 Tamus communis 

 Orchis mascula 



The ash woods are much richer in species than the oak 

 and birch woods, in spite of the fact that the species character- 

 istic of soils containing acidic humus are abundant in the 

 latter woods and absent from the former woods. Indeed, the 

 floristic wealth of the ash woods is even greater than mere 

 lists indicate, for several of the species which are rare and 

 local in the oak and birch woods are more abundant and 

 general in the ash woods. The following species belong to the 

 latter class : — 



Populus tremula 

 Mercurialis perennis 

 TroUius europaeus 

 Aquilegia vulgaris ^ 

 Sisymbrium officinalis 

 Rubus saxatilis^ 

 Rosa tomentosa 

 R. glauca 

 R. arvensis 

 Pyrus Aria^ 

 Geranium sylvaticum^ 

 Polygala vulgaris 

 Tilia cordata* 

 Acer campestre 

 Primula vulgaris 

 Myosotis sylvatica* 

 Adoxa Moschatellina 



Valeriana officinalis 

 Campanula latifolia* 

 Cnicus heterophyllus^ 

 Poa nemoralis 

 Melica nutans^ 

 Agropyrum caninum 

 Festuca sylvatica 

 Hordeum europaeum* 

 Carex sylvatica^ 

 Paris quadrifolia* 

 Convallaria majalis^ 

 Helleborine latifolia 



( = Epipactis latifolia) 

 Listera ovata 

 Orchis mascula 

 Habenaria virescens 



( = H. chlorantha) 



Some species which are characteristic of the ash woods of 

 Yorkshire (cf Smith and Rankin, 1903) do not occur so far 

 south as Derbyshire, and apparently find the intervening 

 non-calcareous soils an effectual barrier. Actaea spicata, 



1 These species are not recorded by Linton (1903) for any of the oak woods 

 of Derbyshire ; but they occur in such woods on the eastern slopes of the Pennines 

 a little to the north of the Peak District. 



