94 NEW DIMORPHIC MUTANTS OF THE OENOTHERAS. 



The size of these cultures is given in table V. 



Table V. 



The offspring of the 4 specimens of Lamarckiana had this uniform 

 type, in the flowering specimens as well as in the other ones. These 

 were examined in June and July when in large rosettes of radical 

 leaves. The offspring of the mutant rubrinervis was also uniform 

 and exactly resembled the race of this name in all its marks, and 

 especially in the brittleness of its stems. The offspring of the original 

 mutant, cultivated in 1911, embraced 129 plants, only 6 of which 

 have flowered, the others having been destroyed before the 

 significance of the culture had been realized. Among these 6, 

 2 were Lamarckiana, 3 pallescens and 1 mut. rubrinervis. Their 

 offspring were studied in 1913, as given in table V. Among the 

 mutants the rubrinervis, liquida, scintillans, lata and cana, as 

 well as one nanella, flowered and proved their identity with the 

 races of these names at that period. 



1911.. Mutant 



Pedigree of mut. pallescens no. 2 

 Mutant 



1913. . Second generation 28 per cent pallescens 



Lamarckiana 1 mut. rubrinervis 



1914.. Third generation 42 per cent pallescens Lamarckiana Lamarckiana 

 Pedigree of mut. pallescens no. 3 



1911 ..Mutant 



Mutant 



1913 . . Second generation 36 per cent pallescens 



1914 ..Third generation 39 per cent pallescens Lamarckiana Lamarckiana 



Lamarckiana 1 mut. cana 



