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Synopsis of Usnea (lichenized Ascomycetes) from the Azores with additional information on the species in Macaronesia

Published online by Cambridge University Press:  10 May 2006

Philippe CLERC
Affiliation:
Conservatoire et Jardin botaniques de la Ville de Genève, Case Postale 60, CH-1292 Chambésy (GE), Switzerland

Abstract

The genus Usnea is a conspicuous component of the macrolichen vegetation in Macaronesia. Ten species are recognized in the Azorean archipelago: Usnea cornuta Körb., U. esperantiana P. Clerc, U. flammea Stirt., U. geissleriana P. Clerc sp. nov., U. krogiana P. Clerc sp. nov., U. macaronesica P. Clerc sp. nov., U. rubicunda Stirt., U. silesiaca Motyka, U. subflammea P. Clerc sp. nov., and U. subscabrosa Motyka. All these species occur in the Canary Islands as well. Descriptive, chemical, ecological and distributional data for each species are provided. Species that have been recorded once for the Azores but not seen, or that are doubtful or excluded in this work, are briefly discussed.

Type
Research Article
Copyright
© British Lichen Society 2006

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