APPENDIX I 



215 



2 The Plant Formation of Siliceous Soils (Silicion) 



Group of Associations 



Chief Associations 



Woods 



Scrub 

 Grassland 



Siliceous swamps 



Birch wood (Betuletum 



tomentosae) 

 Oak wood (Quercetum 



sessiliflorae) 



Siliceous grassland 

 (Xardetum strictae) 



Molinia grassland (Mo- 

 linietum caeruleae) 



Subordinate Associations 



Progressive scrub 

 Retrogressive scrub 



Siliceous grassland 

 with much 



(«) 

 (b) 



(«) 

 (d) 



(e) 



(/) 



Ulex Galhi 

 Pteris aquilina 

 Agrostis temiis 

 Deschampsia 



flexuosa 

 Juncus effiisus 



or J. eflfusus 



forma com- 



pactus 

 Calluna vulgaris 



Vegetation of swamps 



