Abstract
AbstractCladonia reiandCladonia subulataare morphologically similar, but chemically different cup lichens of dry grasslands and nutrient-poor ruderal habitats. Recently,C. reihas been synonymized withC. subulataon the basis of combined morphological and chemical investigations. However, doubts remained due to a molecular divergent North American sample ofC. reicompared to EuropeanC. subulata. To clarify the situation, using molecular methods, we analysed chemically different European samples ofC. reiandC. subulata, as well as other morphologically or chemically similarCladoniaspecies. Molecular data show that European and North American samples ofC. reibelong to the same clade, which is closely related toC. fimbriataand followed by a subclade withC. coniocraeaandC. ochrochlora. The subclade ofC. subulataappears to be distinct fromC. rei. In concordance with molecular data, the presence of homosekikaic acid is the determining chemical feature forC. rei. In addition,C. humilisandC. innominataproved to be molecularly distinct species.
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