90 



The Journal of Heredity 





If 



SINGLE, DOUBLE, AND TRIPLE 

 PISTILS 



Figure 16 The twins and triplets 

 formed from such pistils are usually mark- 

 edly different in size, as shown in Figure 17. 

 The triple-pistilled flowers are shown at the 

 right and left of the picture. One pistil is 

 considerably shorter. 



TWINS AND TRIPLETS 



Figure 15. Twin peaches are formed 

 in two ways, (1) from twin flowers (center 

 row), and (2) from a single flower having 

 twin pistils. Triplets are oroduced either by 

 a combination of these two methods — by twin 

 flowers one of w"hich has double pistils (d 

 and e), or by a single flower with three 

 pistils (b and c. top row). Flowers with 

 more than three pistils are very rare, and 

 quadruplets are in reality double twins, twin 

 double-pistilled flowers producing the quad- 

 ruple form (a, top row). On the bottom 

 row is shown how twinning occurs by the 

 formation of a double flower. Normally 

 three buds are formed at each node, a leaf 

 bud and two flower buds, which oroduce two 

 separate fruits, as at (a). Sometimes a 

 double flower is formed in place of one of 

 the single ones. Twin peaches from such 

 double flowers are usually of about the same 

 size, while those from double pistils are un- 

 equal in development. 



fertilized, but the fruit was able to de- varieties in the setting of these multiple 



velop slightly because of its close con- fruits. Of the list given by Karper, 



nection with the larger fruit. Mayflower, Alton, Japan Dwarf Blood, 



There is consid3rable variation among and Hiley belong to the Chinese Cling 



