196 BOTANICAL GAZETTE [SEPTEMBER 
Fic. 11.—Tuber rot of Red Cobbler variety produced by inoculation with Fusa- 
rium fe sporum; A, B, external and sectional view of same tuber, incubated for 30 a 
aU. Ch, external std sectional view of same tuber, incubated for 30 days at tg BS 
