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Diplodia
The spores (conidia) are brown, 2-celled, and are borne within more or less round fruiting structures (pycnidia). Conidial production occurs (probably holoblastically) on short cells that line the inner walls of the pycnidium. There are a number of similar genera that are distinguished on the basis of pycnidial and spore structure. Most species occur on living or dead plants. The one in the photo above was collected by Bruce Malloch on a dead wild cherry branch in New Brunswick.
Classification: Botryosphaeriaceae (Botryosphaeriales). Holomorphs: Botryosphaeria, Cucurbitaria, Eutryblidiella, Massarina, and others. Ref: Sutton, 1980; Zambettakis 1954, 1955