Lichens of Belgium, Luxembourg and northern France

Distribution map of Verrucaria integra (Nyl.) Nyl.  by Paul Diederich   Verrucaria integra (Nyl.) Nyl.
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On calcareous rocks, only in natural conditions?

Belgium: Mosan: RRR (1898).

Luxembourg: - .

France: Mar.: RRR (1910).

Lit.: Tonglet (1898), Zschacke (1933: 70).

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