Leioderma

Abstract: Leioderma cherokeense P. M. Jorg. & Tonsberg sp. nov. is described from North Carolina, U.S.A., where it grows on bases of trunks of Liriodendron tulipifera. Apothecia and structures for vegetative dispersal are not known. The genus Leioderma is new to eastern North America.

Abstract: The Panariaceae sensu lato of North America are shown to contain 51 species in ten genera: Degelia (1), Erioderma (3), Fuscopannaria (25), Leioderma (1), Moelleropsis (1), Pannaria (8), Parmeliella (5), Protopannaria (1), Psoroma (3), and Santessoniella (3). The following new taxa are described: Fuscopannaria alaskana, F. aurita, F. coralloidea, F. crustacea, F. hookerioides, F. leprosa, F. pacifica, F. ramulina, F. thiersii, Pannaria lurida ssp. quercicola, P. subfusca, and Parmeliella appalachensis. The following new combinations proved necessary: Fuscopannaria californica (Tuck.), F. cheiroloba (Mull. Arg.), F. incisa (Mull. Arg.), Pannaria lurida ssp. russellii (Tuck.), Parmeliella stylophora (Vain.), Protopannaria (Gyeln.), Protopannaria pezizoides (G. H. Weber), and Santessoniella crossophylla (Nyl.). All names are typified and keys are provided to all taxa. The genus Fuscopannaria has an evolutionary center on the Pacific coast where it appears to have evolved taxa for most available niche...