INVENTORY OF THE SPECIES DIVERSITY OF THE GENUS SPIRAEA L. ON THE TERRITORY OF THE BOTANICAL GARDEN "PODILLYA" VNAU AND THE USE OF THE SPECIES INVESTIGATED IN CREATING GARDEN AND PARK COMPOSITIONS

Abstract

The article examines the peculiarities of the use of species and decorative forms of the genus Spiraea in the plantations of the "Podillia" botanical garden of the Vinnytsia National Agrarian University. Namely: Japanese spirea (Spiraea japonica L.), Bumalda's spirea (Spiraea bumalda L.), White spirea (Spiraea alba (Miq.) Zab.), Thunberg's spirea (Spiraea thunbergii Sieb. ex. Blume), Wangut's spirea (Spiraea vanhouttei (Briot) Zab.), medium spirea (Spiraea media L.), birch spirea (Spiraea betulifolia L.). It was established that the species of spirea growing on the territory of the botanical garden "Podillia" of the Vinnytsia National Agrarian University belong to the following sections: Calospira, Glomerati, Chamaedryon, Spiraria. The largest number of plants is the Calospira section, which includes plants of the species Spiraea japonica (Spiraea japonica L.) (12 pcs), Spiraea bumalda (Spiraea bumalda L.) (8 pcs) and White Spiraea (Spiraea alba (Miq.) Zab. ) (4 pcs). As a result of the research, it was established that species of the genus Spirea are highly decorative from the beginning of April to the beginning of November. Although spring-flowering species have a short flowering, but it is very abundant. White, Japanese, and Boumalda spireas have the longest flowering period. Also, studies have shown that, taking into account the decorative qualities of Spireia species, they can be successfully used in the design of landscape or regular style objects in such plant compositions: single or group plantings, mixed borders, curbs and hedges, when creating alleys, undergrowth and the edge of the forest, with greening of the slopes. Based on the results of the observations, landscaping projects were proposed, which demonstrate various ways of using plants of the genus Spirea in combination with other types of plants to create decorative compositions. According to the project decisions, species of the genus Tavolga can be combined with such plants as: Berberis thubergii, Heuchera sanguinea, Euonymus fortune, Coreopsis verticillta, Forsythia Intermedia , Cotoneaster divaricatus, Hydrangea paniculata, Juniperus communis and J. horizontalis.