[Vol. 9 



344 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



inches high were largely used. (Numerous inoculation experi- 

 ments show that maturer plants may be also infected.) 



Wheat: Alabama Blue Stem, Coker's Blue Stem, Black Hulled, 

 Fulcaster, Fultz, Georgia Red, Gladden, Golden Chaff, Gypsy, 

 Harvester King, Hastings, Jones' Climax, Leap's Prolific, Leba- 

 non, Marvelous;, Medium Mediterranean, Michigan Wonder, 

 Poole, Portage, Purple Straw, Red May, Red Wonder, Stover's 

 Miracle, Turkey, Nebraska No. 6, and Turkish Amber. 



No infections were obtained on Bartt, Beechwood Hybrid, 

 Longberry, and Red Rock, but it should be noted that experi- 

 ments would have to be repeated with these varieties before any 

 deductions were made, since the temperature prevailing in the 

 greenhouse at the time inoculations were conducted was con- 

 siderably below the optimum for infection. 



Oats: Appier, Ferguson, Virginia Turf, Wilson, Winter Gray, 

 and Winter Turf. 



Rye : Abruzzi, Rosen, Station, Texas Winter, and Winter Min- 

 nesota. Infections on Ivanhoff No. 3 i not obtained. 

 Barley: Mancheuri, Oderbrucker, and Wisconsin Pedigree No. 



6. 



Corn: Arlington Prolific, Biggs' Seven Ear, Calhoun Red Cob, 

 Chisholm, Coker's Ellis, Coker's Marlboro, Coker's Prolific, Cok- 

 er's Williamson, Eureka, Experiment Station Yellow, Hickory 

 King, Jarvis' Improved, Laguna Mexican June, McFarland, Mos- 

 by's Prolific, Sentell's White Dent, Singleton's Strawberry, Stew- 

 art's Yellow Dent, Surecropper, Thibault's Mexican June, W T eek- 

 by's Improved, Whattey's Prolific, and White Wonder. 



Varieties of corn upon which no infections were obtained are 

 Brazos White Corn, Coker's Garric, Ewing's Mosby, Paymaster, 

 Silvermine, and Southern Beauty. Time has not permitted any 

 adequate study which would definitely show whether or not these 

 are resistant. 



Sorghum: Black Amber, Darco Non-saccharine, Honey, Red 

 Amber, and Sugar Drip. 



The following sorghum varieties yielded no infections: Broom 

 Corn, Silvertop, Shrock Kafir, Sumac, and Sunrise Kafir. Here 

 also conditions for infection were not the best. 



SUMMARY OF THE WORK ON VARIETAL SUSCEPTIBILITY 



The following points may be emphasized: first, that a com- 

 paratively large number of varieties of different cereals are sus- 

 ceptible; second, that the degree of susceptibility has not been 



