The Mutations in the Larnarckiana-Family. 241 



the artificial fertilization of the whole ancestry in my 

 pedigree-cultures. 



Fig. 46. Oenothera lata. Top of a stem, with buds in the 

 axils of the broad bracts ; a, b, c, separate buds in various 

 stages of development; A, B, C, buds of Oenothera La- 

 marckiana in corresponding stages. The buds of lata are 

 seen to be palpably fatter than those of O. Laniarckiana. 



0. lata can easily be distinguished at every stage of 

 its existence from all its allies ; in fact as soon as the 



