Tg09] STEVENS & HALL—VARIATION OF FUNGI II 
VOLUTELLA FRUCTI S. & H., FROM APPLE 
This fungus, when sown thin, forms large indeterminate colonies, 
often with numerous scattered tubercular blotches (jig. ro). 
On pure agar and 
CBA the colonies were 
pale, mycelium hya- 
line, black tubercles 
very sparse. 
On pea agar, black 
tubercles were much 
more abundant, other- 
wise as on pure agar. 
On CBA+sodium 
asparaginate, black 
tubercles were - still 
more numerous. 
On CBA+sodium 
asparaginate + starch, 
Fic. 10.—Volutella fructi S. & H.; colony on pea agar 
black tubercles were showing tubercular blotches, some of them in concentric 
more numerous than rings; mycelium nearly hyaline, due to lack of carbo- ” 
in any of the above, hydrates. 
and the colony was black (fig. 11). 
On CBA-+sodium asparaginate+ glucose, black tubercles were 
still more numerous, so many as to be contiguous, and the whole 
colony was densely black. 
On gelatinized starch, and starch+ Uschinsky’s solution, the my- 
celium was black and some digestion of the starch was observed. 
On none of the above media were spores formed, but on sterilized 
apple twigs spores were produced in abundance.’ 
The differences here noted upon these different media are sufficient 
to alter entirely the general appearance and to shift the fungus from 
the Tuberculariaceae-Dematiae to the Tuberculariaceae-Mucedinae. 
CONIOTHYRIUM FUCKELII SACC., FROM APPLE 
This fungus when growing upon a medium rich in starch becomes 
black in its peripheral layer. Glucose fails to produce the same 
7 N. C. Agric. Exp. Sta. Bull. 196. June, 1907. 
