Usnea pacificana P. Halonen, sp. nov., is reported from the Pacific coast of Canada and the United States. Usnea wasmuthii Räsänen is documented from the states of Washington and Oregon as new to North America. A key to the Usnea species that are similar or related to U. pacificana is provided.
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1 March 2000
Usnea pacificana, sp. nov. and U. wasmuthii (Lichenized Ascomycetes) in Pacific North America
Pekka Halonen
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The Bryologist
Vol. 103 • No. 1
Spring 2000
Vol. 103 • No. 1
Spring 2000