Home – Home – Jornals – Flora and Vegetation of Asian Russia 2016 number 1

The data about algae flora of the mineralized Ulugkol Lake (The State Nature Reserve “Khakassky”). Taxonomic list of seaweed is presented by 109 taxons from specific and intraspecific rank, belonging to 55 genus, 36 families, 9 classes and 5 departments. With respect to species diversity, two division Bacillariophyta - 67 taxons and Cyanoprocaryota - 25 taxons, are distinguished. The greatest number of species has been noted in benthos. Dominants of the plankton and benthos associations are mainly applies to the halophilous and mesogalobous organisms.

As result of the generalization of the whole lichenologic information on Republic Altai, predominantly peculiar, the extent of species diversity its lichen biota currently comprising 1711 species from 310 genera and 94 families has been determined for the first time. The participation of the lichens at the desert steppes, true low cespitose and tall cespitose steppe plant communities of the mountain-steppe belt has been appreciated.

Seven Pinus sibirica living form (single-stemmed, few-stemmed and multi-stemmed straight-stemmed trunk trees, supra nival skirted, shrub-like form, elfin tree, and living windfallen tree) as well as one relatively autonomous morphological structure (elfin wood form in the tree butt of the straight-stemmed trunk mother tree) are identified and described at forest-tundra mountain ecotone in the Aktru mountain glacial basin (Severo-Chuisky Range, the Altai Mountains). Ways of their formation are considered. The main reason of the formation of the living forms excluding the one-stemmed straight-stemmed trunk trees with symmetric crown is death of tree fragments because of weather factors or geomorphological events. During XX century the climatic conditions at the forest-tundra mountain ecotone in the basin were favourable for growth of the living forms of P. sibirica straight-stemmed trunk trees .

The variability structure of 18 morphological floral characters of Potentilla bifurca in 28 coenopopulations of Altai-Sayan Mountain region has been studied. Classification of the characters studied into groups on the basis of relative variability and determinacy has been performed. Distinctions between flower indices individuals of coenopopulations (40.0-92.5 %), coenopopulations in a province (9.5-50.6 %) and coenopopulations in diff erent provinces (2.9-27.1 %) contribute signifi cantly to total variation. Evidence of sexual dimorphism in P. bifurca flowers is independent of conditions of growth.

The results of the investigation of five cоenopopulations of Filipendula ulmaria (L.) Maxim. in the south of West Siberia and Mountain Altai are presented. Ontogenesis of the soboliferous short-rhizome life form was studied. The main structural individual unit of an adult individual is a dicyclic mesorosular monocarpic shoot, there are shoots with incomplete development cycle (latent generative shoots). Two types of populations ontogenetic spectra were revealed: unimodal spectrum in strongly sward coenosises and left-hand spectrum at moderate grazing pressure. The most powerfull plants grow in the fl oodplain coenosises.

The annotated synopsis of the subtribe Hyoseridinae Less. including one genus: Sonchus L. (5 species) and the distribution of species in the administrative regions of Asian Russia are given.

The article contains information about the type materials for 36 taxa of the family Poaceae kept in M.G. Popov Herbarium of the Central Siberian Botanical Garden SB RAS (NSK). The type category is indicated, text of the original label and text of protologue are cited for each specimen. 104 type specimens were found in collections, including the 8 lectotypes, the 7 isolectotypes, 15 holotypes, 24 isotypes, the 1 syntype and 49 paratypes, the 7 authentic specimens was found. Lectotypes for name of 8 taxons were designated: Festuca chionobia T.V. Egorova et Sipliv., Hierochloë glabra Trin. subsp. chakassica Peschkova, Poa altaica Trin. f. subtilis Malyschev, P. barguzinensis Popov, P. botryoides (Trin. ex Griseb.) Roshev. var. glaucissima Popov, P. botryoides var. pendula Popov (NSK) and lectotypes for Elymus pallidissimus (Popov) Peschkova, Festuca popovii E.B. Alexeev (LE). The description of new species Bromopsis malyschevii N. Vlassova is suggested instead of two invalid taxons.

We studied microsporangium wall structure in Trollius ledebourii Reischenb. The mature microsporangium has a 3 layer wall. Differentiation of its layers occurs centripetally, its correlation with periods of sporogenous tissue development was established. We first detected intermediate type of cells developing between meiocytes and tapetum during abnormal microsporogenesis. Dependence of pollen grains development abnormalities on tapetum and endothecium structure changes was revealed.

The results of anatomic investigation and overground organs of Arisaema amurensis Maxim. are represented. Th ese results may be used as the perspective for the introduction as the exotic and decorative culture. It is very interesting that tuberbulbs of these plants were covered with the significant coating tissue as the periderm of Dicotyledon plants.

Data about findings the new localities of the 7 rare and relict species ( Stipa desertorum , Helictotrichon altaicum , Allium nutans , Cotoneaster mongolicus , Stenosolenium saxatile , Rhamnus erythroxylon , Physochlaina physaloides ), of them 2 new species ( Allium nutans L., Stipa desertorums (Roshev.) Ikonn.) for flora of the Selenga Mountain in Western Transbaikalia of the Republic Buryatia.

On the territory of Taimyr southern tundra subzone (ST) 545 species of vascular plants are noted. Th e composition and structure of flora of the Western (W) and East (E) sectors of subzone are distinctly different, they are regarded as independent floristic regions. The share of arctic and east-asian species is greater in E flora, boreal and euroasian greater in W. The groups of characteristic species, marking northern and southern ST boundaries are detected.