The lichen genus Usnea (Parmeliaceae) in tropical South America: species with a pigmented medulla, reacting C+ yellow

In tropical South America (Venezuela, Colombia, Ecuador, Peru, Bolivia and Brazil), we investigated the diversity of Usnea species with a pigmented, C+ yellow medulla. Four species are treated: the sorediate U. ceratina and U. entoviolata, the latter being new for South America, and the non-sorediat...

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Bibliographic Details
Published in:The Lichenologist (London) 2012-09, Vol.44 (5), p.625-637
Main Authors: TRUONG, Camille, CLERC, Philippe
Format: Article
Language:English
Subjects:
Ceratina
Chromatography
fungal morphology
lichens
Morphology
Parmeliaceae
Pigments
Species diversity
taxon descriptions
taxonomic keys
Taxonomy
tropics
Usnea
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Summary:In tropical South America (Venezuela, Colombia, Ecuador, Peru, Bolivia and Brazil), we investigated the diversity of Usnea species with a pigmented, C+ yellow medulla. Four species are treated: the sorediate U. ceratina and U. entoviolata, the latter being new for South America, and the non-sorediate U. cristatula and U. flavorubescens, the latter being newly described here. A detailed description is provided for each species together with an identification key.
ISSN:0024-2829
1096-1135
1096-1135
DOI:10.1017/S0024282912000400