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Macentina, A Lichen Genus New To Europe

The new genus Macentina Vezda was described on the basis of a single species, M. perminuta Vezda, discovered on a collection of leaves from an unidentified tree in Guinea, West Africa (Vgzda, 1973). At the same time as receiving a copy of Dr Vezda's paper, the senior author and Dr F. Rose collected a minute, pale-fruited, pyrenocarpous lichen on Sambucus twigs in Eridge Park, Sussex, which when examined in detail proved to bear a remarkable likeness to the illustrations and description of Macentina perminuta; this similarity was later confirmed by one of us (A. V.). In view of the occurrence of several minor anatomical differences and also the markedly different geographical origins and habitats the Sussex collection is recognized as a new species of Macentina here.