Hello Everyone,

I recently found an ascomycete growing on dead stems of Hedera helix. It most closely resembles a Diaporthe species, with long, black ostioles, blackened host tissue around the fruit bodies and a black, stromatic line running through the host.

The microscopy shows spores with small, hyaline appendages at each end, which seem to rule out common Diaporthe species which would grow on Hedrea.

I have attached an image of the fruit bodies and a sketch of the microscopy.

I wonder if anyone has any idea as to what I have found?

Thank you,
Peter.