Abstract

Protoventuria barriae sp. nov. (Pleosporales; Venturiaceae) forms leaf spots on Vaccinium macrocarpon (cranberry) in North America. The leaf spot is characterized by conspicuous dark brown subcuticular hyphae and a transient reddening of otherwise healthy-appearing leaf tissue. Pseudothecia develop on dead or dying leaf tissue, usually in leaf litter. The fungus produces large, verruculose ascospores enveloped in a thick gelatinous sheath.

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