Fornicatae and Cuphophyllus griseorufescens in the unplaced C. canescens – C. basidiosus clade. The Australasian region may be the origin of the crown group for these lineages, or that region may have retained more ancestral species. Refining the synoptic key and diagnoses for tribes, genera, subgenera and sections requires inclusion of basal species within lineages because the character states that are used JQ1 to delineate these groups often do not correspond to the branching

point for the clades. Despite these gaps and shortcomings, we succeeded in establishing a higher-order structure for Hygrophoraceae that integrates morphological, ecological, chemotaxonomic and phylogenetic data, and where possible, determined which are the correct,

legitimate, validly published names that can be applied to each group under the Linnaean system. GSK872 Acknowledgements We thank the International Institute of Tropical Forestry (IITF), USDA Forest Service for maintaining facilities of the Center for Forest Mycology Research (CFMR) in Puerto Rico, and the Forest Products Laboratory for maintaining facilities and 17DMAG support at CFMR on the University of Wisconsin campus in Madison, WI. Dentinger and Ainsworth were partly supported by grants from Defra, Natural England and the Scottish Natural Heritage. A Long-Term Ecological Research grant DEB 0620910 from the US National Science Foundation (NSF) to the University of Puerto Rico – Rio Piedras in collaboration with IITF, USDA FS augmented laboratory equipment used in this research. The USDA Forest Service, CFMR, provided most of the support. This work was not directly supported by grants, but the following grants were essential in obtaining collections and some sequences used in this work: US NSF Biodiversity Surveys and Inventories Program grants to the Research Foundation of the State University of New York, College at Cortland (DEB-9525902 and DEB-0103621), in collaboration with the USDA-Forest Service, Center for Forest Mycology Research, Forest Products Laboratory in Madison supported collecting in Belize, the Dominican Republic and Puerto Rico. US NSF

grant DBI 6338699 to K.W. Hughes D-malate dehydrogenase and R.H. Peterson at the University of Tennessee, Knoxville supported collecting by E. Lickey, D.J. Lodge, K.W. Hughes, R. Kerrigan, A. Methven, V.P. Hustedt, P.B. Matheny and R.H. Petersen in the Great Smoky Mountain National Park, and sequencing by K.W. Hughes and Lickey. A National Geographic Society’s Committee for Research and Exploration grant to T.J. Baroni (SUNY Cortland) supported the 2007 expedition to Doyle’s Delight in Belize by M.C. Aime, T.J. Baroni and D.J. Lodge. An Explorer’s Club, Washington Group Exploration and Field Research Grant to M.C. Aime and a National Geographic Society’s Committee for Research and Exploration grant to T. Henkel supported collecting in Guyana. In addition to the herbarium curators among our co-authors (D. Desjardin, B.