Oenothera Scintillans. 391 



The amount of 0. ohlonga has greatly decreased, 

 whilst that of Lamarckiana has somewhat increased (see 

 p. 246). 



In the summer of 1899 I again selfed a whole series 

 of plants in this culture. I selected these from the off- 

 spring of two plants which had produced respectively 

 87 % and 90 % scintillans and seemed, therefore most 

 likely to breed true. I only fertilized scintillans plants. 

 The yield, however, was very poor; 10 seed parents only 

 giving more than 60 seedlings each. These could be 

 recorded in June and showed high hereditary coefficients : 



The whole crop raised from the seeds of the 29 plants 

 gave: 



NUMBER OF SEEDLINGS % 



O. scintillans 1126 79 



O. Lamarckiana 93 6 



O. oblonga 209 15 



Total 1428 



These figures agree almost exactly with the mean 

 value of the culture in the previous generation in spite 

 of the fact that I began the culture with two seed parents 

 with exceptionally high ^n/i^/7/a7Z.y-producing capacity, 

 viz., ^7 % and 90 %, and irrespective of the fact that 



