1916] LINK—FUSARIUM 183 
whole plant took place, the fungus girdled the whole stem, while 
plants that were not girdled lived on, even though one side 
was entirely destroyed. There was little lateral and subsequent 
vertical spreading of the fungus from one vascular strand to the 
other. These experiments were repeated with 25 other plants and 
in most cases the same symptoms were observed. These symptoms 
have been repeatedly observed in the dry land areas of Nebraska, 
5.—Rosette produced in laboratory with Fusarium oxysporum, and control 
Fic 
plant; A, control, Early Ohio variety; B, rosetted plant, 10 days after inoculation, 
Early Ohio variety. 
but have always been looked upon as cases of “sun scald,” and 
and in previous experiments with wilting due to F. trichothecioides 
such cases were ignored. 
Plants grown in soil infected with F. oxysporum and F. tricho- 
thecioides showed severe lesions of root and stolons. Examination 
of roots affected with either organism showed that the cortical 
regions are first and most severely attacked, not only intercellularly, 
but also intracellularly, the cells being packed full with hyphae. 
In most cases the cortex could be sloughed off with exceeding ease. 
From the cortex the organisms invaded the stelar regions, where 
