Calcareous mid Siliceous Grassland 



157 



PotentUla procumbena 

 Galium saxatile 

 Gnaphalium aylvatieum 

 Jasione montana 

 Erica cinerea 

 Calluna vulgaris 

 Vaocinium Myrtillus 

 Digitalis purpurea 



Melampyrum pratenae var. 



moutanum 

 Empetrum nigrum 

 Salix repens 

 Orchis ericetorum 

 Luzula multiflora 

 Carex binervis 

 Holous mollis 

 Blechnum Spieant 



On the other hand, the following widespread plants 

 are a few selected from those which are characteristic 

 of calcareous grassland but absent from or rare in 

 siliceous grassland: 



Thaliotrum minus 

 Viola hirta 

 Folygala calcarea 

 Anthyllus Vulneraria 

 Hippocrepis comosa 

 Poterium Sanguisorba 

 Potentilla verna 

 Helianthemum Chamaecistus 

 Galium asperum 

 Asperula oynanohica 

 Scabiosa Columbaria 

 Leontodun nudicaule 



Campanula glomerata 



Origanum vulgare 



Plantago media 



Ophrys apifera 



0. musoifera 



Orchis ustulata 



0. pyramidalis 



Avena pubescens 



A. pratensis 



Koeleria gracilis (cristata) 



Bromua erectua 



Brachypodium pinnatum 



Local varia- 

 tions in 

 floristic 

 composition. 



Interesting local diiferences are seen in the floristic 

 character of calcareous pasture in different 

 parts of the country. For instance, in the 

 north of England, 8esleria caarulea is a very 

 abundant and characteristic member of cal- 

 careous grassland. This grass appears to 

 reach its southern British limit on the Pennines of mid- 

 Yorkshire, and is absent from the limestone of Derbyshire. 

 Actxa spicata and Primula farinosa also seem to have 

 found the siliceous soils of the Leeds and Halifax district 

 an effectual barrier against a southern extension of their 

 range. Carex ornithopoda is a very local plant in England, 



