Calvelo, S/ Stocker-Wörgötter, E/ Liberatore, S/ Elix, JA 2005: Protousnea (Parmeliaceae, Ascomycota), a genus endemic to southern South America. - The Bryologist108(1): 1-15. [RLL List # 198 / Rec.# 26746] Keywords: PROTOUSNEA/ SOUTH AMERICA/ USNEA
Abstract: 6 fig. 1 tab. [Detailed treatment and a key for six species. The new compound 4'-O-demethylsubsekikaic acid is described.]