SEX AlTD FEETILIZATION. 



103 



instance, if we wish to produce a cross or hybrid plant 

 between the common White Lily {Lilium candidum), 



Fig. 44. — ^ULIUM CAHDIDUM. 



figure 44, and some other species or Tariety, we watch 

 for the opening of the flowers and expansion of the 

 petals, A J then we cut off the anthers, B, to prevent 



