introduction

Current Status of the Collection Fund of the Laboratory of Ornamental Plants of the Russian Academy of Sciences

The Collection Fund of the Laboratory of Ornamental Plants of the Main Botanical Garden named after N. V. Tsitsin of the Russian Academy of Sciences has currently 1055 species and varieties, as well as 4 995 varieties and garden forms. It was created on the basis of classical methods of introduction, such as (ecology)-geographical, phytocoenotic and the method of generic complexes. At the same time, the modern policy of forming the collection fund is aimed at creating not only large but also unique collections.

Biometric Characteristics and Aerodynamic Properties of Pollen Grains of North American Pines under Conditions of the Southern Coast of the Crimea

The results of the study of biometric characteristics and aerodynamic properties of pollen of North American species: Pinus radiata D. Don, Pinus sabiniana Douglas, Pinus coulteri D. Don and autochthonous Pinus nigra subsp. pallasiana (Lamb.) Holmboe, grown on the Southern Coast of the Crimea (SCC) are presented. The differences in the size of the pollen grains and their individual parameters are revealed. The pollen of introduced species is characterized by large sizes in comparison with native species.

Special Features of Flowering in Some Clematis L. Species and Forms from Nikita Botanical Gardens Collection

In the studies of ornamental plants seasonal development, flowering rhythms are exceptionally important, since the main criteria for the ornamental value of plants used for landscaping, are the time and duration of their flowering. The aim of the present work was to identify special features of flowering in some Clematis L. species and forms from Nikita Botanical Gardens collection. The objects of this study were 16 taxa. The methodology was based on the principles of introductory studies. Phenological and mathematical methods were applied.

Brunnera – Rare Decorative Culture for Shadow Garden

The assortment of plants for a shadow garden in Bashkortostan, and also regions of South Urals is insignificant, it is not enough data on features of biology of shade and shade-enduring plants. Among them there are species and sorts of Brunnera Stev. genus. Brunnera are decorative and deciduous and beautiful-blossoming plants with the long period of blossoming. Studying of some biological features (seasonal rhythm of growth and development, morphometric param- eters, introduced stability) of five sorts of B.