286 



PHYSIOLOGY OF GROWTH AND CONFIGURATION 



alpine plants are due to the environmental conditions under which they grow. 

 This author raised plants from the same lowland-grown seed in three different 

 localities, near Paris, in the Alps and in the Pyrenees. Those grown near Paris 

 had the usual appearance of their lowland parents, while those grown in the 



Pig 162.- 



-Two plants of Betonica officinalis, one grown in the lowland (P) and the other ii 

 the mountains (JW). {After Bonnier.) 



mountains had many of the characteristics of alpine forms. For example, of tb 

 two specimens of Betonica officinalis shown in Fig. 162, one (Jkf) grew in thi 

 mountains and the other (P) in the lowland. In the mountain form the whol 

 plant was smaller and the leaves were more crowded and near the base of th 

 stem. The difference between plants of Jerusalem artichoke {HelianthH 



