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Abstract
Two new species of poroid Hymenochaetaceae (Aphyllophorales, Basidiomycota) are described and illustrated. They were causing decay on living and standing dead Polylepis australis (“tabaquillo” or “queñoa”) in the Córdoba Mountains in central Argentina. Inonotus serranus is characterized by a biannual basidiocarp, with a dark line separating tomentum from context; ellipsoid to ovoid, thick walled, colored spores; and the absence of setae. Phellinus uncisetus is characterized by uncinate setae with ventricose uniradicate base and well-differentiated apical portion; a basidiocarp attached by a narrow area to the substrate; ventricose, hyaline cistidioles; and by subglobose, hyaline spores, with very thick walls. The identity of Phellinus setulosus is discussed.
Financial support of Conicor of FONCyT (through PICT 1908/97) and of CONICET (through PIP 4062/96) is warmly acknowledged. The authors are grateful to the curators of the herbaria BAFC, BPI, PDD and TFM for loans of original and type specimens. F. Gelonch kindly helped to improve the Latin. We appreciate Dr. L. Ryvarden's valuable suggestions. CU is a fellow and MR is researcher of the National Research Council of Argentina (CONICET).