The Genus Tilletiopsis

In making isolations from leaves of various plants using the spore-fall method, many cultures of a fungus identified as Tille? tiopsis Derx were obtained along with those of species of Sporobolomyces (3). Macroscopically the two genera can be distinguished by the white or cream color of the colonies of Tilletiopsis in contrast to the salmon or pink color of the colonies of Sporobolomyces. In figure 1 is shown the appearance of the colonies on malt agar plates formed as a result of ballistospores being forcibly discharged from the surface of leaves affixed to the inside of petri dish covers. In most cases, the colonies of Sporobolomyces were in the majority, but those of Tilletiopsis wrere usually present in considerable numbers.