THE SCENTED CALLA 



grains of one form to be round and the pollen 

 grains of the other form to be oval. This 

 insignificant difference, however, is full proof 

 that the plants belong to different strains. 



The union of the divergent strains seemingly 

 brought together pairs of hereditary color-factors 

 — if we hold to the Mendelian explanation — that 

 had been separated and hence had gone unmated 

 for an indefinite number of generations. 



In the same way, we may suppose, I had 

 brought together, through a happy chance, in the 

 course of these breeding experiments with the 

 calla, two strains that bore complementary odor- 

 factors, the union of which released and made 

 tangible the latent quality of perfume-bearing, 

 which, in all probability, no calla of either 

 strain had outwardly manifested for hundreds 

 or perhaps for thousands of years. 



— No race is perfected — no 

 living thing is freed from 

 the struggle for existence. 



