54 



Mutability and Individual Variation. 



Fig. 14. Striped Dahlias (Dahlia variabilis striata nana), 

 grown from seed. The central flower of the plant in 

 the middle had yellowish red stripes on a pale red 

 ground ; the left flower on the same plant had one-half 

 (shaded darker in the figure) entirely red, the other 

 reddish yellow and pale red stripes. The two separate 

 flowers figured below were of other color varieties ; in 

 the right one red stripes were on a white ground, in the 

 left dark violet stripes on a pale violet ground. The 

 first plant had branches, in 1898, whose flowers were en- 

 tirely red, afl'ording an example of so-called bud-varia- 

 tion. 



