4 BOTANICAL GAZETTE [JULY 
A similar change of habit is well known in the genus Fusarium, 
which in culture, crowded or not, often abandons acervulus forma- 
tion, thus changing its systematic position from the Tuberculariaceae 
to the Mucedinaceae. The genera Colletotrichum and Gloeosporium 
similarly abandon acervulus formation and thus suffer still greater 
taxonomic disturbance by moving from the Melanconiales to the 
Hyphomycetales. 
Fic. 4.—Volutella fructi S. & H., showing colonies on thinly sown plate culture- 
ASCOCHYTA CHRYSANTHEMI STEVENS, FROM CHRYSANTHEMUM 
This fungus was plated January 12, 1907. Myriads of pycnidia 
were present four days later. Thick plating caused no inhibition of 
pycnidial formation, no naked spores, and no constant effect upon 
the number of pycnidia produced. 
VOLUTELLA FRUcTI S. & H., FROM APPLE 
Thinly sown, the colonies were large, of indeterminate growth, 
showing dark centers with pale borders (fig. 4). Thickly sow? 
growth was inhibited and these characters lost (fig. 5). 
