Sorting and blending of unit characters. 



199 



or contrast of the same quality or feature. For example; in regard to 

 width of leaves, the leaves of pycnocarpa are narrow in contrast to 

 those of nutans, although there are a number of species of Oenothera 

 with much narrower leaves than those of pycnocarpa , and in fact pyc- 

 nocarpa would not be considered a narrow leaved species. Also there 



Fig. 1. 

 mother. From tlie left to the right they are: nutans; the blend triplet, hyhrida nutella 

 tortuosa. The main stem of the last is fasciated and has split into two branches, the 

 great as it would have been if it were not for the fasciation. 



are species with broader leaves than those of nutans. So with the 

 bracts, for the purpose of comparison between the two parents, as well 

 as in dealing with the comparative value of the same quality in the 

 h3'brids, they are large in pycnocarpa, small in nutans. The petals are 

 small in jjycnocarpa, large in nutans, though the actual difference in 

 size in not great, but it is constant under normal conditions. The stems 



