Lichens of Belgium, Luxembourg and northern France

Distribution map of Cladonia portentosa (Dufour) Coem. © by Paul Diederich   Cladonia portentosa (Dufour) Coem.
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Cladonia portentosa – Luxembourg (Lorr.), Steinfort – © 2003 by Paul Diederich

Syn.: Cladina portentosa (Dufour) Follmann, Cladonia impexa Harm., C. sylvatica α sylvestris a. tenuis subf. condensata Aigret, C. subimpexa P. A. Duvign., C. portentosa f. subimpexa (P. A. Duvign.) Ahti

On humus and acidic soil in heathlands, among rocks, also in open woodlands.

Belgium: Mar.: RR, Camp.: AC, Brab.: RR, Mosan: R, Ard.: AC (type locality of C. subimpexa), Lorr.: RRR.

Luxembourg: Ard.: AR, Lorr.: AR.

France: Mar.: R, Ard.: R, Lorr.: RRR.

C. subimpexa is a very rare chemotype without any taxonomic value, with a conspicuous grey colour and lacking usnic acid.

Lit.: Boul.: 68, La69: 132, Mü1: 149, NL84: 13, NL92: 169, Ramaut et al. (1966), Van Landuyt & Hoffmann (1996).

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