Аннотация:We validate the name Quercetea mongolicae and 56 subordinated syntaxa of broadleaved and mixed forests from the Far East which were published invalidly. We suggest a new syntaxonomical decision to consider the order Lespedezo bicoloris- Quercetalia mongolicae in the class Quercetea mongolicae instead of Querco mongolicae– Betuletea davuricae Ermakov 1997.