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1 September 2011 The saxicolous species of the genus Usnea subgenus Usnea (Parmeliaceae) in Argentina and Uruguay
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Abstract

Eight primarily saxicolous Usnea subgenus Usnea species are reported from Argentina and Uruguay: U. amblyoclada (Müll. Arg.) Zahlbr. (syn. nov. U. pinnata Räsänen), U. densirostra Motyka, U. durietzii Motyka (syn. nov. U. caespitia Motyka), U. exigua J.M. Rodr. & P. Clerc sp. nov., U. fastuosa (Müll. Arg.) Zahlbr., U. hieronymii Kremp. (syn. nov. U. hieronymii var. adusta Kremp.), U. lutii J.M. Rodr. & P. Clerc sp. nov. and Usnea saxidilatata J.M. Rodr. & P. Clerc sp. nov. are described with morphological, anatomical and chemical data. Their taxonomy and distribution are discussed. A key to the saxicolous species, including those occurring secondarily on rocks (i.e., U. columbiana Motyka, U. cornuta Körb., U. dasaea Stirt. and U. cf. perhispidella J. Steiner) is provided.

Juan Manuel Rodriguez, Cecilia Estrabou, Camille Truong, and Philippe Clerc "The saxicolous species of the genus Usnea subgenus Usnea (Parmeliaceae) in Argentina and Uruguay," The Bryologist 114(3), 504-525, (1 September 2011). https://doi.org/10.1639/0007-2745-114.3.504
Received: 14 June 2010; Accepted: 1 March 2011; Published: 1 September 2011
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