PrOPCP'- 1 07 



^ORNELL ' ;RS 



Studies in Heredity as Illustrated by the Trichomes 



of Species and Hybrids of Juglans, Oenothera, 



Papaver, and Solanum 



BY 



WILLIAM AUSTIN CANNON 



WASHINGTON, D. C. 

 Published by the Carnegie Institution of Washington 



1909 



3 



