_ true pistils : they are separate an 
me Botany and Zoology. 123 
formation of the embryo. This was mentioned as furnishing the most 
probable clue to the explanation of the reputed fact that squashes are 
spoiled (that is the quality and appearance of the fruit altered) by pump- 
kins growing in their vicinity, and vice versa ; and even that melons are 
iled by squashes; and this notwithstanding the fact, ascertained by 
poilec q 
Naudin, that distinct species of Cucurbitacee refuse to hybridize, although . 
€ various races of the same species cross with the greatest facility. It is 
generally agreed that the alteration of the character of the fruit is imme- 
ate, 1.e., that it affects the ovary itself which has been contaminated | 
by strange pollen, It might then equally affect the fruit whether the 
seeds were any of them fertilized or not; and in Naudin’s experiments 
the application of pollen apparently caused the fruit to set, even when 
no ovules were fertilized. 
ow a similar case of direct agtion of alien pollen upon the fruit, or 
is famili ery farmer i 
in the 
A 
grain, occurs in Indian Corn, and is familiar to ev 
bryo. a Mee 
e and development of the Flower and Fruit of the Pear ; 
maintained on general morphological grounds. The pips are the 
d 
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