50 



PLANT SOCIOLOGY 



Corydalis, etc.); a summer-green type, photosynthetic throughout 

 the summer; a winter-green type, photosynthetic throughout the 



Jq/7. fedr. Mar. April May June Ju/y Am,!] Sept. Oct. Nou. Dec. 



Fig. 30. — Assimilation period of typical species in the Querents robur forest of England. 



{After Salisbury.) 



Jan. feb. Mar. Apr. May J unsJul\j flag Sept Oct fJcy. Oec..^ 

 Quercus cocci fera , . 

 Cistus monspeliensis . 

 Euphorbia cMracias. 

 BracJiypodium ramosum 

 Bupleurum rigidum . 

 Thrincia tuberosa . . 

 Bellis silvestris . . . 



Lathyrus setifolius . 

 Centranthus caJcitrapa 

 Vicia gracilis . . . 

 Geranium purpureum 



PredpHaiion (Monfpellier) 



Fig. 31. — Annual variation in volume of some species of the Quercetum coeciferae of the 

 Mediterranean garigue in southern France and the curve of precipitation. 



year {Galeohdolon, Ajuga reptans, etc.) ; and an evergreen type {Hedera, 

 Vinca, etc.) (Fig. 30). The prevernal type corresponds to the vernal 

 aspect, and the winter green to the hibernal aspect, whereas the 



