Plate VII. 



Self and cross-pollinated Buffiim pears from tlie same tree. Nos. 548, 549, 550, 

 and 551 are from flowers pollinated with Bartlett; Nos. 334 and 331 are from flowers 

 inclosed in paper bags, hence self-pollinated. The two unnumbered fruits are from 

 the tree at large. They show very plainly by their form and also by their seeds 

 {see p. 68) that they belong to the cross-pollinated type, i. e., were crossed by insects. 

 Photographs of the seeds of 549 to 551 may be found in PI. xii. The description of 

 these fruits occurs on p. 66. 

 100 



