196 HYBRIDIZING AND CROSSBREEDING 



four. A piece of glass and a camel's hair brush are usually 

 employed to transfer the pollen, but we use our thumbnail 

 and a dull knife blade, which we find more convenient 

 and just as efficient, care being exercised not to injure the 

 stigmas. 



V. ./. Ex. Stat 



Single Carnation Spread to Show Sexual Organs and Petals 



Before doing any crossing, the operator should make 

 a ,'careful study of the structure of the pod containing the 

 tiny lovules which, when fertilized, will produce the seed. 



