60 Plant-Breeding 



continually, and it soon became the chief member of my 

 experimental garden. It was one of the evening prim- 

 roses." This (E. Lamarkiana was found to produce a 

 large number of mutants, both when growing wild and 

 under cultivation. 



The (E. Lamarkiana plants which became the basis of 



FIG. 17. (Enothera Lamarkiana and (Enothera nanella in bloom. 



future experiments were found growing wild in a field at 

 Hilversum, near Amsterdam, Holland. Little is known 

 of its history except that it is a native of America. It has 

 not been found growing wild in America in recent years, 

 although there seems to be evidence that it was seen and 

 collected in the Southern States in the last century. The 

 near relatives of (E. muricata, which were very common in 

 the sandy regions of Holland, are very stable ; de Vries 



