The class Loiseleurio-Vaccinietea in the territory under study is represented by 4 associations and 2 subassociations.
The associations and subassociations have been described for the first time. Three associations: Dryado
octopetalae-Eriophoretum vaginati, Ptilidio ciliares-Alnetum fruticosae and Cetrario laevigatae-Racomitrietum
lanuginosi occupy the largest areas. They thrive in upper flat and prominent parts of watersheds.
Mire areas with unusual structure were found and studied in the south-east of West Siberia. They are
represented by a series of parallel ribbons in river valleys; the central parts of the mires are formed by complexes
of mesotrophic pools with Carex species and forested peat beds. The mire areas are characterized by higher
species diversity and by presence of rare and endangered species. Description is given.
The steppe belt of Tannu-Ola southern macroslope contains two subbelts. The main communities of the subbelt
of desert steppes (1000–1300 m) are represented by desert steppes (Nanophyto grubovii-Stipetum krylovii, Lagochilo ilicifolii-Stipetum glareosae)
and communities where Stipa orientalis predominates (Elytrigio geniculatae-Stipetum orientalis). The main communities of the subbelt of true steppes (1300–1600 m) are represented by bunchgrass
steppes (Artemisio frigidae-Stipetum krylovii) and steppes of ass. Carici pediformis-Caraganetum bungei.
Ecological-phytocoenotic position of annual halophytic Suaeda in the south-east of the West Siberian Plain was analyzed. The place of plant communities dominant by Suaeda species in Braun-Blanquet classification was
determined. Five associations and two communities were characterized. New association Suaedetum kulundensis and community of Suaeda tuvinica were described.
Individual morphogenesis and ontogenetc structure of coenopopulations were studied; current status of Bupleurum scorzonerifolium coenopopulations in Buryatia was assessed by a complex of characters.
Biomorphological structure of Baikalo-Lensky State Nature Reserve flora and its separate floristic complexes was analyzed by means of K. Raunkier’s and I.G. Serebryakov’s approaches. Some biomorphs reflecting
extreme climatic conditions, as well as some ecobiomorphs reflecting edaphotopic conditions of the leading floristic complexes were considered.
Cell structure of the leaf blade mesophyll was studied in 4 species of grasses of the genus Festuca (F. gigantea, F. pratensis, F. pseudovina and F. valesiaca) distributed in different natural and climatic conditions of Siberia. The
main shapes of cell chlorenchyma were identified. General and distinguishing features of spatial organization of assimilatory tissue of the leaves were revealed and characterized in Festuca species under study.
The results of study of flavonoid content and composition of Bistorta officinalis Delabre from natural habitats in Siberia are given. Plants growing in the conditions of increased insolation at a height of 1500–2000 m and
higher contain more flavonoids than plants of meadow communities in the plain, which indirectly confirms their protective function. A range of variations of the flavonoid content in mass flowering period amounts to 1.13–5.61 % (in flowers) and 0.69–5.10 % (in leaves). Flavonol aglycons were studied by HPLC methods in the plants collected in the Altai.
Algae were studied in the eutrophic peat bog (Plesetsk Region, Arkhangelsk Oblast). One hundred sixteen
species represented by 120 specific and intraspecific algal taxa were identified. The division Chlorophyta
prevailed. Spectra of life forms, ecological groups and morphotypes of algae were determined. Both typically
edaphophilous and hydrophilous species (history of the biotope) take part in formation of soil flora of the bog.
Sixteen species of maple are promising for introduction in Siberia. The diversity of forms was studied.
Literature and Russian and foreign web-based information on woody plants were analyzed. Four hundred and fifty four subspecies,
variants and forms of interest as ornamentals were identified for 12 species. Biological, ornamental and ecological characteristics of them and figures are given.
