472 
Growth forms, based on the classi- 
fication of Wellman & Blaisdell (1941), 
of the 40 isolates of the gladiolus Fu- 
sarium as these isolates appeared in Au- 
gust, 1953, are given in table 10. When 
cultures of like form were grouped to- 
gether, 11 were classified as raised, 17 as 
ILLINOIs NATURAL History SURVEY BULLETIN 
Vol. 26, Art. 6 
intermediate-raised, 6 as intermediate-ap- 
pressed, and 6 as appressed. Photographs 
of 36 of the cultures are shown in figs. 13 
and 14. 
Table 10 shows that by 1953 some of 
the cultures were no longer of the same 
type as the original isolations. When these 
Fig. 14.—Raised, appressed, and intermediate growth forms of brown rot and basal dry rot 
isolates of Fusarium grown on Wellman’s agar. 
Cultures 45-8 through 50-22 in the upper four 
rows are brown rot isolates; cultures 46-12 through 50-26 in the two bottom rows are basal dry 
rot isolates. Cultures are 20 days old. 
