IV] 



GRASSLAND ASSOCIATIONS 



115 



study on account of its wide range of forms and the different 

 nature of its habitats. 



A list of the members of the Molinia grassland is appended, 

 and the number of associated species characteristic of the 

 moorland formation is obvious : — 



Relationships of the Plant Associations 

 OF THE Siliceous Soils 



The relationships of the plant associations of the sandstones 

 and shales of the southern Pennines are summarized in the 

 following table : — 



'Woods of Betula puhescens 

 or of Quercus sessiliflora 



Sandstone 



rocks 

 and screes 



Various stages of scrub 



Nardus pasture 



Swamps 



Molinia pasture Nardus pasture with much Calluna 



[Moorland Formation] 



8—2 



