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Abstract
Six species of Cystangium, a genus of sequestrate taxa related to Russula, were collected in Patagonia (Argentina and Chile) during autumn 2001. Two species, C. depauperatum Singer & A.H. Sm. and C. nothofagi (E. Horak) Trappe, Castellano & T. Lebel, were already known from this region, while four new species, C. domingueziae, C. gamundiae, C. grandihyphatum and C. longisterigmatum, are described, illustrated and a key to the species is provided. In addition, sequences of the ITS (rDNA) region were obtained to explore the phylogenetic relationships of our South American Cystangium species.
Acknowledgments
This study was supported by CONICET, PIP No. 6193, Argentina. We thank personnel of the Nahuel Huapi and Lanin National Parks for facilitating sampling within the parks, L.T.P. fellow of the Red Latinoamericana de Botánica (RLB2011-P12) and Dr Teresa Lebel and Dr Laura Domínguez for providing useful literature. E.N. is a researcher of CONICET (National Research Council of Argentina). J.T.’s participation was supported in part by the U.S. National Forest Service, Pacific Northwest Research Station, Corvallis, Oregon. We also thank the Laboratorio de Microscopía Electrónicay Microanálsis (LABMEB) of the Universidad Nacional de San Luis, Argentina, for the SEM photomicrographs. The herbaria CORD, HFV and OSC kindly accessioned collections cited in this paper. Drs Laura Domínguez, Roberto Godoy, Efrén Cázares, Carolina Barroetaveña and Michael Castellano participated in the field collecting with admirable vigor. Financing for M.E.S. provided by a grant from the USA National Science Foundation DEB-1354802.