ABSTRACTA coelomycete isolated from upright stems and fruits of cranberry in Massachusetts is illustrated and described asSynchronoblastia crypta, constituting a monotypic new genus. The fungus produces a single layer of cushion-shaped or irregular conidiogenous cells lining an ostiolate pycnidial conidioma. Each conidiogenous cell gives rise simultaneously and blastically to numerous uninucleate conidia. Similar conidia are produced on assimilative hyphae on agar media.