32 



Gh'aft-Infectiou^ Disease 0/ Datura 



TABLE I. 



Quercina Jimson Weeds (Datura Stramonium). 1916 Records. 



(10) Quercina (1 line) crossed with 

 Normals (5 lines) 



34 



1348 283 1065 



79-01 



TABLE IL 



Comparison of Seedlings and Adults from Quercina Parents. 1916 Records. 



Seedlings 



Adults ... 

 Totals 



INos. 



I Percentage 



I Percentage 



Nos. 



Normal 



273 

 21-1 



Questionable 



349 

 27-0 



83-1 

 227 



Q. 

 16-9 

 46 



N. 



12-3 

 43 



Q. 



87-7 

 306 



Quercina 



671 

 51-9 



N. 



0-3 

 •2 



Q. 



99-7 

 669 



In Adult stage, 79-0% = Quercina ; 21-0 °/o = Normal. 



