IV] GRASSLAND ASSOCIATIONS 119 



Verbascum Thapsus Avena pratensis 



Plantago media A. pubescens 



Asperula cynanchica Koeleria cristata (agg.) 



Galium sylvestre "Bromus erectus" 



Scabiosa Columbaria Brachypodium pinnatum 



Campanula glomerata Carex omithopoda 



Pulicaria dysenterica Ophrys apifera 



Inula squarrosa "0. muscifera" 



Senecio erucifolius Orchis morio 



Picris hieracioides 0. ustulata 



Leontodon hirtus 0. pyramidalis 

 Hieracium spp. 



2. In rocky places, particularly where sheltered: 



Asplenium viride Geranium lucidum 



A. Trichomones G. sanguineum 



A. Adiantum-nigrum Hypericum montanum 



A. Ruta-muraria Pimpinella magna 



Cystopteris fragilis Satureia Acinos 



Thalictrum minus Galium asperum 



Draba muralis Valerianella carinata 



Sedum Telephium V. olitoria 



"Saxifraga sphonhemica" Centaurea Scabiosa 



S. hypnoides Allium vineale 



Rosa spinosissima A. oleraceum 



3. In places, where the soil is loose, all semi-ruderai 

 plants, occurring, as a rule, most abundantly on the refuse- 

 heaps ("rakes") of old lead-mines or modern gravel- workings]: 



Arenaria verna Thlaspi virens 



A. serpyllifolia "T. sylvestre" 



Cardamine hirsuta Saxifraga tridactylites 



Cochlearia alpina Alchemilla arvensis 



Hutchinaea petraea Viola lutea 

 Arabis hirsuta var. amoena 



Sisymbrium Thalianum V. calaminaria 



Erophila verna Myosotis collina 



var. virescens Sherardia arvensis 



E. praecox Carduus nutans 



"E. inflata" Cnicus eriophorus 



From the above lists, it will be seen that calcareous grass- 

 land differs greatly from siliceous grassland not only in the 

 soil conditions but also in the floristic composition. In my 

 judgment, the edaphic characteristics of the habitats are so 

 essentially different that the two types of grassland, siliceous 



