Processes of anamorph cell replication in Trimmatostroma abietis are d
escribed. Growth and conidiation are delimited on the basis of morphol
ogical, ultrastructural and ecological criteria. Cellular expansion sh
ifts from bidirectional intercalary in exponential phase cells to isod
iametric in late stationary phase cells, in the latter case with endog
enous asexual reproduction. Ultrastructural similarities to dothideace
ous black yeasts are discussed.