Halonen P., Clerc P., Goward T., Brodo I.M. & Wulff K.
(1998):
Synopsis of genus Usnea (lichenized Ascomycetes) in British Columbia, Canada,
Bryologist,
101(1): 36-60
Twenty-three Usnea species and species groups are reported from British Columbia, Canada. Usnea chaetophora, U. diplotypus, and U. nidulans s. lat. are new to North America, whereas U. esperantiana and U. rigida s. lat. are documented for the first time for Canada, and U. ceratina and U. rubicunda are new to British Columbia. New chemotypes are also reported, e.g., in U. fragilescens var. mollis and U. subfloridana. Usnea stuppea (a synonym of U. substerilis) is lectotypified. A key to the genus …
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