Abstract
Collections of Eucalyptus leaves throughout the forested regions of Indonesia have revealed three species of Mycosphaerella associated with prominent leaf spot symptoms. A new species Mycosphaerella gracilis and its anamorph Pseudocercospora gracilis are described here, the connection between the anamorph and teleomorph having been confirmed by cultural studies. Similarly, Stenella parkii is described as the anamorph of Mycosphaerella parkii, and an additional species of Mycosphaerella is recorded.