[Vor. 3 
280 ANNALS OF THE Missourt BOTANICAL GARDEN 
water containing organic acids, there is a sediment of yeast 
cells and a film of anastomosing colonies. Gelatin is liquefied. 
The cells (fig. 7) vary in size from 6-8 X 8-10». Besides the 
single-celled chlamydospores, there are occasionally many- 
celled spores borne on short conidiophores. The septa in 
the spore occur both at right angles and parallel to the 
long axis and are muriform. 
Culture 8, Alternaria sp?—The colonies of this culture are 
at first made up of a central mass of yeast cells with my- 
Fig. 8. Culture 8. Vegetative cells, conidia, chlamydospores, and muriform 
spores. 
celium extending radially from the center. Budding conidia 
are rapidly formed at regular intervals on this mycelium. 
The cells (fig. 8) vary in size from 3-6 X 4-9, After seven 
days’ growth on agar, the colonies may be separated into 
a central flat dise and several distinct zones, these zones 
gradually changing from a dark green to a black color. In 
sugar nutrient solutions there is a rapid growth and a very 
thick, slimy, greenish black film. Dextrose, saccharose, and 
