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Abstract
These new species of Hypoxylon are described: H. elevatidiscus, H. squamulosum, H. subalbum and H. vinosopulvinatum. A referenced list of all Hypoxylon species known to us described since 1996 is given and a key presented. Names associated with Hypoxylon that were not given in the Ju and Rogers monograph are annotated and diagnostic corrections of taxa discussed in that monograph are given.
This study was supported by National Science Council of R.O.C. Grant NSC91-2621-B-001-003 to YMJ and by U.S. National Science Foundation Grant DEB-9813304 to JDR. The curators of GZU, K, S, and VLA are thanked for loaning specimens and searching for material. We thank Michael J. Adams, Washington State University, for aid with photography and electron microscopy.