Six species of the genus Didymodon
with caducous leaf apices are reported from Russia (Siberia) based on
collections from KRF, IRK, MHA, LE. The specimens previously identified as
D. rigidulus s.lat. and D. johansenii (Williams) Crum are found to
represent also D. anserinocapitatus
(X.-j. Li) Zand., D. hedysariformis
T. Otn., D. gaochienii B.C. Tan
& Y. Jia, and a new species Didymodon murrayeae, T. Otn. sp. nov.
Diagnostic characters and illustrations are provided for the taxa. For D.
hedysariformis and D. johansenii sporophytes are found, for D.
gaochienii and D.murrayae perichaetia are also indicated.