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The lichen genus Usnea (lichenized Ascomycetes, Parmeliaceae) in Estonia with a key to the species in the Baltic countries

Published online by Cambridge University Press:  07 November 2007

Tiiu TÕRRA  and
Tiina RANDLANE
Tiiu TÕRRA
Affiliation:
Institute of Botany and Ecology, University of Tartu, Lai 38/40, 51005 Tartu, Estonia. Email: tiiut@ut.ee
Tiina RANDLANE
Affiliation:
Institute of Botany and Ecology, University of Tartu, Lai 38/40, 51005 Tartu, Estonia. Email: tiiut@ut.ee
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Abstract:

The occurrence of 12 Usnea species in Estonia is verified by investigating c. 1800 specimens. The known distribution and substratum preferences of Usnea taxa in Estonia are summarized. Picea is the main substratum for Usnea species in Estonia, but occasionally these species occur also on deciduous trees, wood, and exceptionally on rock. A key for identification of 16 taxa recorded in the three Baltic countries is provided and diagnostic morphological and chemical characters used in the key are discussed. A new chemotype of U. fulvoreagens has been identified. U. wasmuthii is reported as new to Lithuania.

Keywords

chemotypesdiagnostic charactersdistributionsubstratum
Type
Research Article
Information
The Lichenologist , Volume 39 , Issue 5 , September 2007 , pp. 415 - 438
Copyright
Copyright © British Lichen Society 2007

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