252 THE HONEY-BEE. 



frequently visited by bees. They then produced 

 plenty of seed, but one of the two plants less than 

 the other, as this species shows some tendency to 

 be dioecious. 



" The trial was repeated on another variety with 

 white petals tipped with red. Many stigmas on two 

 corymbs were covered with pollen from the forego- 

 ing purple variety, and these produced eleven and 

 twenty-two seeds, which germinated well. A large 

 number of the stigmas on several of the other 



FIG. 73. TROPCEOLUM MAJUS. FIG. 74. TROPCEOLUM MAJUS. 



(Young bloom.) (Old bloom.) 



corymbs were repeatedly smeared with pollen from 

 their own corymb ; but they yielded only five very 

 poor seeds, which were incapable of germination. 

 Therefore the above three plants, belonging to two 

 varieties, though growing vigorously and fertile with 

 pollen from either of the other two plants, were 

 utterly sterile with pollen from other flowers on the 

 same plant." 



A condition similar to that described in the 

 cineraria is found in the nasturtium (Tropceolum 

 majus). In the young blossom may be observed the 



