FAMILY LAMIACEAE IN THE SIBERIAN SECTOR OF THE CIRCUMBOREAL FLORISTIC REGION: DISTRIBUTION, ECOLOGY, BIOMORPHOLOGY
Vera A. Cheryomushkina1, Eugenia B. Talovskaya1, Alexandra A. Guseva1, Alexey Yu. Astashenkov1, Gulnora R. Denisova1, Elizaveta K. Komarevtseva1
Central Siberian Botanical Garden, SB RAS, Novosibirsk, Russia
Keywords: Lamiaceae, ecological-cenotic characteristics, biomorphological features, Siberia
Abstract
The article presents the results of the study of the Lamiaceae family in the Siberian sector of the Circumboreal floristic Region. 151 species from 29 genera were identified, which is 25.5 % of the total number of Lamiaceae species in the Circumboreal floristic Region. The highest concentration of species was found in the Altai-Sayan, West Siberian and Transbaikal provinces (from 71 to 96 species), in steppe belt communities (50.3 %) on stony-gravelly substrate. The following biomorphological features of shoots and individuals were analyzed: shoot growth cycle (mono-, di-, and polycyclic), shoot structure (semi-rosette, rosette, elongated), growth pattern (monopodial or sympodial), inflorescence location (terminal or lateral), flowering frequency (polycarpic, monocarpic), ontogenesis duration (annual, biennial, perennial), shoot or skeletal axes growth direction (orthotropic, plagiotropic, anisotropic), branching pattern (acrotonic, mesotonic, basitonic). The spectrum of life forms was determined, including 3 dwarf shrubs, 1 subshrub, 3 dwarf subshrubs, and 11 herbs (18 life forms in total). The distribution of life forms by floristic provinces is shown. It has been established that the most diverse life forms of the family representatives are in the Altai-Sayan province, and the least diverse in the Arctic province. The diversity of biomorphological features of the species is described and a set of morphological features characteristic of plants of most species is revealed. It is shown that perennials, polycarpics with monocyclic, rosette-less, anisotropic shoots, apical arrangement of inflorescence, basitonic branching, sympodial growth and mixed root system predominate in the family. Taproot and longrhizome herbs dominate among the life forms. t has been revealed that the diversity of life forms and biomorphological features of the shoot system determine the distribution of species in different ecological-cenotic conditions of the Siberian sector of the Circumboreal Region.
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