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A Reexamination of the Fungal Genera Cryphonectria and Endothia. J. A. Micales, Former graduate fellow, Department of Plant Pathology, Physiology and Weed Science, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, Present address: U. S. Department of Agriculture—U.S. Forest Service, Forest Products Research Laboratory, One Gifford Pinchot Rd., Madison, WI 53705; R. J. Stipes, Professor, Department of Plant Pathology, Physiology and Weed Science, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061. Phytopathology 77:650-654. Accepted for publication 25 July 1986. Copyright 1987 The American Phytopathological Society. DOI: 10.1094/Phyto-77-650.

The morphology of nine species of Cryphonectria and three species of Endothia was examined by light microscopy to determine if the separation of Endothia from Cryphonectria proposed by Barr is warranted. Barr’s descriptions of the fungi were accurate. Those species retained in Endothia produced diatrypoid stromata and nonseptate, allantoid ascospores; those species transferred to Cryphonectria formed valsoid stromata and monoseptate, ovoid to ellipsoid ascospores. The adoption of Barr’s classification system is recommended because it attempts to organize relationships within the Diaporthales in a consistent manner.