Д 
1916] 
DUGGAR—THE TEXAS ROOT ROT FUNGUS 17 
what, but never in such masses as characterize certain 
species of Sporotrichum or Verticillium. 
In view of the importance of this observation, and failing 
to secure material from correspondents, a trip to Paris, 
Texas, was arranged in September, 1915, with the view of 
securing fresh material and of making further observations 
on the fungus in the field. The time selected proved favor- 
able, and an examination of the cotton fields in the vicinity 
of Paris revealed the Оготшт in unusual abundance. Nev- 
ertheless, ‘‘dead spots’’ in many fields were examined before 
the characteristic fruiting 
stage was found. Then it was 
located in some quantity in a 
** dead spot’’ of about one acre 
in extent, occurring in a very 
rich, black waxy soil in a low- 
lying area of the field. In this 
area no less than a hundred 
or more of these conidial cir- 
cles were found. They varied 
in diameter from 3 to 30 cm. 
The majority of these were 
found in the furrows or ‘‘mid- 
dles’’ between the rows of cot- 
ton, yet they also occurred оп 
the ridge rows, and in seven 
cases they gleck diseased 
cotton stalks. In the latter 
cases, however, the strands Fig. 2. mM omnivorum: 
penetrating the spore-bearing large- celled hypha 
layer appeared to come from 
the soil in general rather than directly from the diseased root. 
In every case the typical color of the spore mass was light 
pinkish cinnamon, and in thin strata pinkish buff, fading some- 
what on drying. At that date the circular area consisted of a 
more or less perfect crust of spores sometimes broken or pow- 
dery. A few of the spore areas had become overgrown with 
such olive-green moulds as Cladosporium and Macrosporiwm. 
2 
