THE SEASONAL RHYTHM OF INTRODUCED <i>FRAXINUS </i>SPECIES (OLEACEAE) DEVELOPMENT UNDER THE CONDITIONS OF KARELIYA
The long-term (1986-2008) studies of 3 <i>Fraxinus</i> L. species ( <i>F. excelsior</i> L., <i>F. americana</i> L. and <i>F. pennsylvanica</i> Marsh.) development, introduced to the Botanical Garden of Petrozavodsk State University (South Karelia, middle taiga subzone) were conducted. The studied species were characterized by considerable similarity in the time course of the majority of phenological stages. <i>F. americana</i> and <i>F. pennsylvanica</i> appeared to be the most adapted to the introduction conditions and promising for landscaping.