Otnyukova T.N.1 2003. Contribution to the moss flora of Todzha Valley (Tyva Republic, South Siberia) // Arctoa. Vol. 12: 97–110 [in Russian].

1 Sukachev’s Institute for Forest Research, Siberian Branch of Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036 Russia

KEYWORDS: check-list, biodiversity, Tyva, South Siberia, Todzha Valley, Didymodon, ecology.

ABSTRACT. Preliminary annotated list of mosses of the Todzha Valley (Republic Tyva, South Siberia) includes 193 taxa of 93 genera of 36 families. Recently described Orthotrichum furcatum is found in four new localities. Habitats differentiation of Didymodon taxa is outlined: D. rigidulus var. rigidulus, D. rigidulus cf. var. glaucus and D. anserinocapitatus grow on open dry rocks, D. rigidulus var. icmadophilus and D. hedysariformis grow on rocks along river, D. gaochienii and D. tophaceus grow on wet rocks at the lake bank. The presence of sporophytes is marked.

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