Diaporthe albosinensis on Betula albosinensis (BJFC-S1670). A Habit of conidiomata in wood B transverse section of conidiomata C longitudinal section through conidiomata D conidiogenous cells attached with beta conidia E conidiogenous cells attached with alpha conidia F beta conidia. Scale bars: 200 μm (B–C); 20 μm (D, F); 10 μm (E).