Vegetative Mutations. 



627 



Dut doubt, cases of such hybrid segregation, and there f«jrc 

 liave no immediate bearing on the question of vegetative 

 mutations. The same is true of the bud-variations of 

 eversporting varieties (see Plate I, Antirrhiiiiiin) which 



Fig. 142. Rhus typhina. A leaf of an otherwise green blI^h 

 wiiich was almost yellow from a to ^ ; these leaflet^ have 

 grown much smaller (on one side at a). Doom (1880) ; 

 collected bv Mrs. Weber. 



have already been dealt with at sufficient length. More- 

 over the graded differences between the various branches 

 of a plant belonging to an eversporting variety are not 

 instances of mutations, and, as a rule, do not affect the 



