Oenothera Nanella. 



371 



children are the nanella mutants (nan.) whose seeds I 

 sowed. The number of offspring from each separate 

 parent are recorded in the tables. 



OENOTHERA NANELLA. 



Total 950 



Total 240 



Total 1273 



Altogether there were 2463 seedlings which w^ere all 

 without exception O. nanella. 



These results seem to me to justify the belief that the 

 remaining nanella-muta.nts of 1895 would also, if I had 

 collected their seed and sown it, have proved constant. 



One thing which I learnt from these extensive sow- 

 ings was that the dwarfs were recognizable, and could 

 therefore be recorded, at a much earlier stage than I had 

 imagined before — viz., in the pans, before the first trans- 

 planting. Now, it is just the transplanting in such ex- 

 periments which is the greatest labor and it is impossible 

 to hand it over to an assistant on account of the danger 

 of possible mistakes, so that this discovery opened up the 

 possibility of testing the constancy on a much larger 

 scale. 



I used for this purpose the nanellas, referred to on 

 page 262, which came up in 1896 from seeds which had 



