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

Published online by Cambridge University Press:  24 August 2012

Camille TRUONG  and
Philippe CLERC
Camille TRUONG
Affiliation:
Conservatoire et Jardin botaniques de la Ville de Genève, CP 60, 1292 Chambésy, Switzerland; Laboratoire de systématique végétale et biodiversité, Faculté des sciences de l'Université de Genève, CP 60, 1292 Chambésy, Switzerland. Email: camille.truong@ville-ge.ch
Philippe CLERC
Affiliation:
Conservatoire et Jardin botaniques de la Ville de Genève, CP 60, 1292 Chambésy, Switzerland; Laboratoire de systématique végétale et biodiversité, Faculté des sciences de l'Université de Genève, CP 60, 1292 Chambésy, Switzerland. Email: camille.truong@ville-ge.ch
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Abstract

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.

Keywords

chemistryendemismmorphologyNeotropicstaxonomy
Type
Research Article
Information
The Lichenologist , Volume 44 , Issue 5 , September 2012 , pp. 625 - 637
Copyright
Copyright © British Lichen Society 2012

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