1909] STEVENS & HAIL—VARIATION OF FUNGI 5 
SPERMOEDIA PASPALI FRIES, FROM PASPALUM? 
Spores of this fungus were sown January 19, 1907, in plates 
giving colony densities of 90, 54, 30, 14, and 1 per square millimeter. 
At all of these densities germination was practically 100 per cent. 
and growth proceeded equally in all plates during the early stages. 
On February 11 it was noted that all colonies which came nearly in 
Fic. 5.—Volutella fructi S. & H., showing effect of thick sowing. 
contact were sporing. Growth then stopped. In the plates bearing 
only one spore per square millimeter the colonies continued to enlarge 
slowly and to produce many spores in the central portion, though 
remaining white, not attaining the usual yellow color. Deep colonies 
appeared like the superficial, but bore no spores. On February 7 the 
colonies on thin plates (1 per square millimeter) had attained a 
2 Later study has shown this to be the imperfect stage of an undescribed species 
of Claviceps, which we shall describe in a subsequent paper 
