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Two new lichen species Peltigera frippii Holt.-Hartw. and P. scabrosella Holt.-Hartw.are described. Their morphology, chemistry, and ecology are discussed, and their distribution in Norway is mapped. New chemical data are also given for the related species P. lyngei Gyelnik, P. malacea (Ach.) Funck, P. neckeri Müll. Arg., and P. scabrosa Th. Fr.
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J. Holtan-Hartwig (1988) studied this question.
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