302 



The Pedigree Families. 



their full stature. So that even if the plants do give 

 rise to ever so many mutations in their seeds, there is 

 always the possibility either that there will be no sign 



Fig. 55. Oenothera Laniarckiana. An entire plant with 

 flowers on its main stem and lateral branches. 



of them or that traces of them will only be discovered 

 from time to time.^ 



A simple and certain method of discovering whether 



* Sur I'introduction de I'Oenothera Lamarckiana dans les Pays- 

 Bas. Nederl. Kruidk. Archief, Aug. 1895. 



