More than hundred specimens of problematic or taxonomically re-evaluated taxa were revised in the Bryophyte Herbarium of the Hungarian Natural History Museum, Budapest (BP) and in the herbarium of P. Erzberger, Botanic Garden and Botanical Museum Berlin Dahlem (B). As result two species (Lophozia silvicola, Ulota interm edia) can be added to the Montenegrin bryophyte flora and one species (Brachythecium tenuicale) should be deleted. The recent distribution of several taxa of conservation interest was clarified, e. g. rarities like Neckera pumila, Ulota bruchii or genera potentially threatened due to climate change like Philonotis and Timmia. The results are important contributions to the preparation of an updated checklist and red list of the Montenegrin bryoflora.