The result of study of
collections from 16 localities in Ust-Maya District is presented. 253 species
were found; their list is annotated by altitudinal and habitat data. Localities
of some species extend their ranges considerably: Plagiothecium
berggrenianum, Hypnum saitoi, Indusiella thianschanica, Bardunovia baicalensis,
Didymodon hedysariformis, etc. Nomenclatural novelties are: Orthotrichum
iwatsukii Ignatov, nom. et stat. nov. [=O. macounii var. japonicum
Iwats., O. laevigatum Zett.
var. japonicum (Iwats.) Lewinsky] and Pylaisia steerei (Ando
& Higuchi) Ignatov [=Pylaisiella steerei Ando & Higuchi].