48 



IPOMCEA PURPUREA. 



Chap. II. 



tion. Their relative heights are shown in the two following 

 tables : 



Table XIV. 



The average height of the six self-fertilised children of Hero 

 is 74 54 inches, whilst that of the ordinary self-fertilised plants 

 of the corresponding generation is only 62 58 inches, of as 100 

 to 84. 



Table XV. 



Here the average height of the three self-fertilised children of 

 Hero is 88 - 91 inches, whilst that of the intercrossed plants is 

 84-16; or as 100 to 95. We thus see that the self-fertilised 

 children of Hero certainly inherit the powers of growth of their 

 parents; for they greatly exceed in height the self-fertilised 

 offspring of the other self-fertilised plants, and even exceed 

 by a trifle the intercrossed plants, all of the corresponding 

 generation. 



