Notes on Homobasidiomycetes from Northern Canada and Alaska

Abstract

of this fungus was obtained from the Schweinitz Herbarium (No. 1899) located in PH. The only fungus present on the specimen was sterile and apparently a species of Asterina. The original description of D. lauri borboniae .... macula minuti orbiculari, in ambitu manifestius sed etiam onmino ex fibrillulis radiantibus, conflata, aterrima, laxius imposita pagina superiori folii. . ., leaves no doubt that the fungus Schweinitz was describing was not a Phyllachora. Saccardo's transfer of this fungus to Phyllachora is therefore incorrect. Specimens of a number of other Phyllachora spp. occurring on several genera in the Lauraceae were obtained from BPI. Only one of these, P. catesbyana Chardon on Octotea sp., has been collected in the U. S. This species, as well as all other species described on members of the Lauraceae for which descriptions were found, has much smaller ascospores than P. perseae. A specimen in BPI labeled Phyllachora lauri borboniae (Schw.) Sacc. collected by Diehl in 1931 from Smith Island, North Carolina, is P. perseae. This is the only collection seen, other than from the type locality. Grateful acknowledgment is made to the curators of BPI and PH for loan of specimens examined during this study, to Mr. William H. Willis, Duke University, for preparing the Latin description and to Dr. C. Booth, Commonwealth Mycological Institute, for examining the fungus.