Lichens of Belgium, Luxembourg and northern France

no map available   Collema nigrescens (Huds.) DC.
see legend below picture
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Collema nigrescens – Ascospores – © 1990 by P. Diederich

Syn.: C. vespertilio (Lightf.) Hoffm., incl. var. purpuraceum (Schaer.) H. Olivier

Reported from Belgium by DG: 20 and from Luxembourg by Ko: 320, but no material seen.

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