Plate IV 



PJt^t. S. il'mghum 



Quercus Rohur, Butula tomentosa, Fagus sylvatica, Plnits .^ijlvestris, 



Pteris aquiUna, Callima vulgaris. Asbdown Forest, Sussex, on 



Ashdown sand. 



pilot. S. uranffJiom 



Betula tomentosa, Pyrus Aria, Fagus sylvatica, Calluna vulgaris, 

 Pteris aquiliiia. Toy's Hill, Kent, on Hythe Beds, Lower Greensand. 



Oak-birch heath association. 



