Collema texanum (Collemataceae) — new lichen for Russia, and other saxicolous Collema species from Stanovoye Upland (Baikal Siberian Region)

Collema texanum Tuck. is reported for the first time from Russia (Stanovoye Upland, Severo-Muisky Range). The description and locality of the species are provided. In addition, the localities of seven Collema species in Kodar, Barguzinsky and Severo-Muisky ranges are presented: C. сristatum (L.) F. H. Wigg. var. marginale (Huds.) Degel., C. fuscovirens (With.) J. R. Laundon, C. glebulentum (Cromb.) Degel., C. multipartitum Sm., C. polycarpon Hoffm. var. polycarpon, C. ryssoleum (Tuck.) A. Schneid. and C. undulatum Laurer ex Flot. var. granulosum Degel. The species C. glebulentum is recorded as new to the Asian part of Russia, C. multipartitum and C. polycarpon var. polycarpon — to Stanovoye Upland.