f58 



THE POLLINATION OF PEAR FLOWERS. 



cieiit in this respect. Altogether the self-poiliiiated fruits, which re- 

 ceived the same care in handling as the crosses, were decidedly inferior 

 to them. Both kinds were wrapped in paper and ripened in a box in 

 a warm room. Kot one sound seed was found in the self-pollinated Buf- 

 fums. The difference in seeds between these and the crosses or insect- 

 pollinated fruits was therefore very striking {see PI. xii). Plates vii and 

 VIII will give a better idea of the shapes of these pears than could be 

 got from any description. 



We have in the Buffum an excellent type of a self-fertile variety of 

 pear, as it produces fruit abundantly where insects are excluded. From 

 the character of the fruits on the trees at Geneva, however, it is plain 

 that they bear the marks of cross-pollination. Insects cross-pollinate 

 the Buffum just as they do the Bartlett or Clairgeau. The cross- 

 pollen was undoubtedly mixed on the stigma with greater quantities 

 of Buffum pollen, but even the Buffum prefers cross-pollen when it can 

 get it. 



Mr. Fairchild examined the fruits outside the bags on these Buffum 

 trees and thought he could detect a few pears of the self-pollinated 

 type. These were cut open and were always found to be deficient in 

 seeds, while on the other hand, the typical Buffum fruits were well sup- 

 plied with seeds. 



BOUSSOCK. 



Boussoch self-pollinated, inclosed in paper hags. 



Eecord 

 No. 



Fruits. 



Weight. 



Shape. 



Quality. 



Season. 



Remarks. 



3381 

 3384 



Average . . . 



Grams. 

 94 

 115 



104 



Typical 



do 



.--.do 



do 



Perfect. 

 Do. 









Eecord 

 No. 



Seeds. 



Sound. 



Abortive. 



No. 



Weight. 



Remarks. 



No. 



Weight. 



Remarks. 



3381 

 3384 



Average . . . 





 1 



Grams. 

 



0. 05 



Fairly plump 



10 

 9 



Grams. 

 0. 02 

 0.04 



Large, dark. 

 Do. 



0.5 



0. 03 



9. 5 



0.03 



COLUMBIA. 



Columbia crossed with Bartlett. 



Record 

 No. 



Fruits. 



Weight. 



Shape. 



Quality. 



Season. 



Remarks. 



4161 

 4162 



Average . . . 



Grams. 

 177 



in 



144 



Typical 



do 



Good 



....do 



do 



Perfect. 

 Do. 



P 







