IX 



HEREDITY 



157 



producing a group of plants with leaves of identical 

 length (i.e., identical within the F.E. of fluctuation). Thus 

 it seems highly probable that the length of the loaf 

 is inherited as a separate character, although it is distorted 



100 150 



Fig. 59. — Length of the Leaf. 



from the parental length by autogenous fluctuation. The 

 same probability is suggested by correlation diagrams for 

 leaf -length with height, with petal length, &c. ; such 

 diagrams show a distinct indication of isolated groups, 

 such as we shall inspect shortly in the flower measurements. 



