Variation and Heredity 



; 95 



These two new forms, as well as the common O. lamarck- 

 iana, were collected, and from these plants there have 

 arisen the three groups or families of elementary species that 

 De Vries has studied. In his garden other new forms also 

 arose from those that had been brought under cultivation. 

 The largest group and the most important one is that from 

 the original O. iamarckiana form. The accompanying table 



OENOTHERA LAMARCKIANA 

 Elementary Species 



