216 VEGETATION OF THE PEAK DISTRICT 
3. THe PLANT FORMATION OF THE ACIDIC 
PrEaty Sorts (OxopIon) 
Formation Chief Associations Subordinate Associations 
Moor Molinia moor (Moliniétum 
caeruleae) 
Heather moor (Callunetum 
vulgaris) 
Heather moor with much 
(a) Vaccinium Myrtillus 
(6) Eriophorum vagina- 
tum 
Bilberry moor (Vacciniétum 
myrtilli) 
Cotton-grass moor (Erio- 
phoretum vaginati) 
Cotton-grass moor with 
much Eriophorum angus- 
tifolium 
Retrogressive moor with 
much 
(a) Vaccinium Myrtillus 
(6) Empetrum nigrum 
(ec) Rubus Chamaemorus 
(d) Bare peat 
