THE GENUS BASIDIODENDRON

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Abstract
Sebacina, Exidiopsis, and Basidiodendron, three genera of the resupinate tremellaceae, are recognized. Sebacina, based on Thelephora incrustans Pers. ex Fries, is retained (in sensu stricto). Exidiopsis, established for Exidia effusa Bref., is accepted as a genus. The taxon Bourdotia, originally created by Bresadola in 1908 as a subgenus with Sebacina (Bourdotia) galzinii as the type and in 1913 elevated by Bresadola and Torrend to generic rank, is proposed as a subgenus of Exidiopsis. Since Bourdotia galzinii is the type of Bourdotia, the generic name Basidiodendron created by Rick in 1938 in order to accomodate B. luteo-griseum is reinstated for the arid-reticulate gloeocystidiate species formerly included in Bourdotia. Two subgenera of Basidiodendrcn are recognized, namely the type subgenus Basidiodendron established for B. luteo-griseum Rick and Asarcogloea subg. nov. based on Sebacina pini Jacks. & Martin. The type subgenus Basidiodendron includes six species. In Asarcogloea, there are four species involved. Two of these, B. subreniformis sp. nov. and B. nodosa sp. nov., found in Ontario inhabiting decaying wood, are described for the first time. Taxonomic keys and illustrations are included for these species.

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