THE FLOWER AND THE BEE 



Waite then experimented with 144 pear-trees belonging to 

 38 varieties. More than half of them when self-pollinated 

 proved to be wholly or nearly self-sterile; among which were 



Fig. 115. Common Pear. Pyrns communis 



Bartlett, Anjou, Clapp's Favorite, Howell, Lawrence, and 

 Winter Nelis. Self-fertile varieties were Angouleme, Bosc, 

 Buffum, and Flemish Beauty. Most of the fruit, however, 

 seems to be the result of crossing, since pollen from other varie- 

 ties is prepotent over own pollen in the self-fertile varieties. 



266 



