48 



THE POLLINATION OF PEAR FLOWERS. 



The above experiments seein to indicate tliat tlie Kieffer is only 

 partially satisfactory as a self- fertilizer. In tbe Sontli tlie large 

 Kieffer orcliards, whicli bloom when no other variety of pear trees are 

 around them, demonstrate beyond any question that self-fertilization 

 or individual crossing is sufficient to set the most abundant crops. No 

 pear is more regularly and wonderfully productive than the Kieffer. 

 In the South the Kieffer is grown on its own or on Le Conte roots. It is 

 said that as far north as Delaware this variety should not be grafted 

 or budded on common pear or dwarf roots. May it not be then that 

 we have in the above an example of the influence of stock on cionl 

 Cross-pollination is able to overcome this effect, however, as is shown 

 in the 100 x^cr cent on tree 91 obtained by crossing with Bartlett. 



LAWRENCE. 



Bccord of 2 trees at liochesier (Scries III). 



Tree 

 No. 



Metliod of treatmcut. 



Number of clusters. 



Fruits set. 









No. 



Per ct. 



94 



Covered with paper bags 



71 













(2855-2869). 











Exposed to insect visits 





44 



11. {) 



95 



Covered witli i)aper bags 



103 













(3G58-:!(i80). 

 Exposed to insect visits 



ISS 



204 



14.5 



Remarks. 



Medium-sized, thrifty stand- 

 ard ; bloomed very heavily 

 and fruited well. 



^s^oar iSTo. 94 and similar to it. 



Beeord of 3 trees in Smith orcliard, Geneva (Series IV). 



Covered with paper bags | 38. 

 (189-200). i 



Exposed to insect v isits i 54 



Pollinated with Lawrence .. 9. 

 Crossed with Kieiler (438) 

 Crossed with Aujou (439) ... 1 (4 llowers) 



Covered Avith paper bags 13. 



(201-204). 



P'xposcd to insect visits 47 



rollinated with Lawrence 7. 



(440.441). 



Ci ossed witli Mount Vernon 1 . 



(442). 



Crossed with Sheldon (444). 1. 



Covered with paper bags 15. 



(309-316). 

 Exposed to insect visits.. . 

 Pollinated with Lawrence 



(47(i_478). 

 Crossed with Aiigonleme. . 

 Crossed with Kieller (480) . . 3 



6 (25 flowers) 



2 (12 flowers) 



(12 flowers) 











38 



8.1 



















1 



25 











26 



7.3 











1 



13 



















15 



3.7 



























Thrifty standard, in grass; 

 bloomed well and fruited 

 moderately. 



Do. 



Like No. 96, but less fruitful. 



The work on the Lawrence indicates that it is one of the completely 

 self-sterile sorts. The cross-pollinations involved too few flowers to 

 render the experiments conclusive. 



