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A new freshwater Porina (Porinaceae, Ostropales) from Great Britain

Published online by Cambridge University Press:  02 November 2015

Alan Orange*
Department of Biodiversity and Systematic Biology, National Museum of Wales, Cathays Park, Cardiff CF10 3NP, UK. Email:


Porina rivalis Orange is described as new from rocks in streams in Great Britain. The involucrellum is yellow or orange within, but dark grey to purplish red at the surface; the ascospores are 3-septate, 13·0–18·5×4·0–5·5 μm.

© British Lichen Society, 2015 

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