40 



IPOMCEA PURPUREA. 



CHAP. IL 



namely, that most of the flowers on the self-fertilised plants 

 were somewhat monstrous. The monstrosity consisted in the 

 corolla being irregularly split so that it did not open properly, 

 with one or two of the stamens slightly foliaceous, coloured, 

 and firmly coherent to the corolla. I observed this monstrosity 

 in only one flower on the crossed plants. The self-fertilised 

 plants, if well nourished, would almost certainly, in a few more 

 generations, have produced double flowers, for they had already 

 become in some degree sterile.* 



Crossed and self -fertilised Plants of the Tenth Generation. Six 

 plants were raised in the usual manner from the crossed plants 

 of the last generation (Table X.) again intercrossed, and from 

 the self-fertilised again self-fertilised. As one of the crossed 

 plants in Pot I. in the following table became much diseased, 

 having crumpled leaves, and producing hardly any capsules, it 

 and its opponent have been struck out of the table. 



* See on this subject * Variation 

 of Animals and Plants under 



Domestication,' chap, xviii. 2nd 

 edit vol. \i, p. 152. 



