Phenology of the far east species of euonymus in the Mari El Republic

The results of phenological observations of 2014-2017 years for the 4 Far East Euonymus species of VSUT Botanical Garden-Institute are presented. The species with the earliest and latest dates of phenophases are identified. Euonymus macropterus is characterized by the earliest beginning of vegetation, its greatest duration, and the earliest ripening of fruits that increase the decorative effect of plants in the autumn period.