Mar. II, 1918 



Sterility in the Strawberry 



635 



Table VII. — Percentage of aborted pollen in flowers, of various positions, from 120 

 cultivated varieties, 18 controlled seedlings of cultivated varieties, jj selfed seedlings of 

 one of tliese, j F^ plants of F. chiloensis X Wilson, 7 Fj plants of F. cuneifolia X 

 Magoon, and 10 F^ plants of F. vesca X F. cuneifolia— -Continued 



The most striking fact exhibited by the counts in Table VII, other 

 than the general presence of some aborted pollen, is the variability of 

 the pollen condition within a variety. Abington, for instance, shows a 

 range of from 7 to 37 per cent of abortive pollen. Abundance from 2 

 to 33 per cent, and Bederwood, which usually produces a high per- 



