[Vor. 3 
30 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
Fig. 3. Production of era? Ken 
of F. conglutinans in Usehin s fluid 
after five days. Culture xL рн 
lucida sketch x 1000. 
to be justifiable in such a 
group as the genus Fusarium, 
where a classification based 
on morphology alone has led 
and would continue to lead 
to confusion in many cases. 
That this character is con- 
stant in the case of F. con- 
glutinans, there can be no 
doubt, but as additional evi- 
dence, some forty-three cul- 
tures of this organism have 
been maintained in the lab- 
oratory in connection with 
this work for a period of from 
six months to two years, and 
in no case did they produce 
red color on rice media, while 
cultures of F. orthoceras, 
carried as controls, did. 
Moreover, on other media 
the organism maintained constant similar- 
ities with cultures from similar sources 
which oninoculation into the host produced 
the disease. The organisms were grown 
on potato hard agar, dextrose bouillon 
agar, soil extract agar, cooked potato plugs, 
cooked potato stems, and cooked rice. The 
mycelium in all cases grew well, giving a 
white fluffy growth at first, which gradu- 
ally turned cream color, and in old cultures 
showed ochreous to brown strands in the 
aerial mycelium in the upper part of the 
tube. Spores of the “тпісто” type were found 
in all cultures in great abundance, espec- 
tally during the early part of the growth 
of the cultures. The production of aérial 
mycelium was most abundant in those 
cases where the amount of carbohydrate in 
Fig. 4. Method of 
branching of myce 
li о 
Camera lucida 
es x 1000. 
the substratum was greatest or most available. 
