Flowering and fruiting of woody plants introduced in the taiga zone (on the example of the Botanical Garden of the Institute of Biology, Komi Science Centre)

The material on flowering and fruiting of woody plants introduced in the Botanical garden of the Institute of Biology, Komi Science Centre, Ural Branch, RAS, is presented. The information about the formation of dendrocollection, its species and age composition of plants is given. The data on the ratio of fruiting, only flowering and non-flowering plant species of the collection, taking into account their geographical origin, are presented. It is noted that a high percentage of fruiting plants in each geographical area is due to the spread of species in the Northern regions. Much attention is paid to the flowering of woody introducents. The distribution of the number of flowering species by flowering time and the colour of flowers is presented. It was found that the greatest number of taxa consists of plants with bright color flowers -240 taxa of 326, or 73.6%. Maximum flowering species falls on June. Observations revealed the periodicity in the timing of the abundance of flowering and fruiting, which depends primarily on the biological characteristics of the species and the temperature conditions of the vegetation and winter periods. According to the degree of abundance and frequency of flowering the plants are divided into five groups, on the regularity and abundance of fruiting - into two groups. Much attention is paid to the cultivation of plants from the seeds of local reproduction.