242 



Journal of Agricultural Research voi. xv, no. 4 



Table III. — Results of successive transfers of Puccinia graminis tritici from various 



sources to rye 



Original host. 



Place of collection. 



Previous history of 

 rust. 



Result. 



Agropyron coninum. 

 Agropyron cristatum 

 Agropyron tenerum. . 



Do. 



Do. 



Elymus macounii. 

 Hordeum jubatum. 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Hordeum vulgar e. . . 

 Do 



Do. 

 Do. 



Emerson, Manitoba 



St. Paul, Minn 



Valley City, N. Dak 

 do 



Emerson, Manitoba 



Glasgow, Mont 



....do 



Crookston, Minn. . . . 

 Winnipeg, Manitoba 

 Two Harbors, Minn . 

 Grand Rapids, Minn, 



Minot, N. Dak 



Cut Bank, Mont 



Williston, N. Dak... 

 Emerson, Manitoba. 

 Moorehead, Minn. . 



do 



....do 



....do 



St. Paul, Minn 



...do 



....do 



...do 



Wi 



B<-W2— Ba 



Bs 



B16 



Wi 



wi : 



Wi 



Wi 



Wi 



W2 



Wi 



Wi 



Wi 



Wi 



Wi 



R2-B4-Ri-Wi 



R2-B4-R1-W2-B1. 

 R2-B4-R1-W2-B4. 

 R2-B4-R1-W2-B8. 



R^; lo-R^; 2-R-?-; .-R^ 



38 9 13 2 



Ri-_R-i_R^_R°; ±_r£ 



7-R--R--R^ 



R^ 



23 



M 



R— 



2S 



s-R^: S-R7; 2-R- 



10 5 3 



X3-R-; 7-R-: 



6-R-; s-R- 



27 2 



4_R.i-; 2_R^ 

 7 2 



ii-R— ; i9-R-:8-R R- 



SI 10 9 I 



R^;37-R^:28-R-;ii-R— ;4-R- 

 46 43 20 17 ^ 3 



i^' S-R-: 8-R^ 

 20 II 3 



e-R** 



W9.. 



Wio. 



R-^ 



31 



31 



i-R- 



4-R7 

 3 



6-R— ; lo-R— ; 3 

 31 13 



i-R--R-;i-R^ 



5 4 S 



ii-R— 



5 



R— -R^-R— R- 



14 II 3 1 



7 ^7. 



Ril_Rl2_Ri-:4_R_s_RjL.,_R£ 



33 20 II 24 s s 



9-R-' 2-Rf ; 3-R- 



9-R— ; 9-R-' 4-R- 



22 10 3 



R^; 17-R-: 12-R- 



R-; 4-R- 

 13 4 



R--R- 

 7 3 



ix= Long-time association with host; number of urediniospore generations indefinite. 



