Lichens of Belgium, Luxembourg and northern France
Cladonia portentosa (Dufour) Coem. |
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).