The
revision of Brachythecium from Russia that use both traditional
morphological appoach in combination with nuclear ITS study reveals three
undescribed species in Asian part of the country. They are described here as B.
baicalense, B. boreale, and B. extremiorientale. The species status
of B. udum, B. acutum, B. brandegei, B. rotaeanum is discussed. Brachythecium
digastrum is synonymized with B. laetum. New combinations: Eurhynchiastrum
pulchellum var. barnesii and Sciuro-hypnum delicatulum are
suggested. Brachythecium buchananii is revealed in Europe. ITS data
allow to reduce the ambiguity of taxonomic decisions in the group, although
sometimes good species has no difference in ITS between species, e.g. in group
of B. salebrosum+B. erythrorrhizon +B.brandegei+B.glareosum.