143 



In 1896 a neighbor planted some popcorn in close 

 proximity to sweet corn. In every case there was an imme- 

 diate etiect. Cases of this kind are numerous. 



I have given enough evidence to show the immediate in- 

 fluence of pollen on corn. It is only necessary to add that in 

 some cases it would seem that the varieties of corn are not 

 sufficiently fixed, and that a change from the type may be 

 due to a previous cross. 



The opinions in regard to other plants are very diverse. 

 Crozier^" says. "The writer is disposed to think that the 

 evidence is still insuflBcient to show that there is an observ- 

 able efiect of cross upon the ovary the first year except in 

 Indian corn." 



Darwin observes that when white and blue varieties of 

 the pea are planted near each other, they mutually cross, and 

 in the autumn, blue and white peas were found in the 

 same pod. There has been much discussion concerning the 

 immediate eflPects of the pollen of certain varieties of the 

 orange. Budd assures me he has made personal observa- 

 tions in California, and thinks there can be no question as to 

 its immediate eflects. Darwin cites a case in which Gallesio^^ 

 fertilized the flowers of an orange with pollen from the lemon; 

 and one fruit thus produced bore a longitudinal stripe of 

 peel having the color and flavor of a lemon. 



California orange-growers are convinced that the naval 

 orange shows itself where this pollen is used. In several 

 hybrid plums and grapes that I have seen, no immediate 

 eflects was visible, although there is said to be an immediate 

 effect in some pears, and Waite found this notably true in his 

 experiments. 



10 Department of Agriculture Report, 1887, p. 213. 



11 Sarwln : animals and plants, etc,, p. 430. 



