The paper presents a checklist of the species invading the natural phytocenoses of the Far Eastern Federal District of Russia (FEFD) that includes 40.6 % of the state territory. It summarizes original data on distribution, habitats and inva sive ness status (IS) of 116 alien species belonging to 99 genera of 32 families. Eigh teen species are only beginning to invade natural cenoses and have IS 3; 76 species intensively invade natural cenoses and are listed in the group with IS 2. Trans former are represented by 22 species with IS 1, of which Ambrosia arte misiifolia, Bidens frondosa, Solidago canadensis, Impatiens glandulifera and Hordeum juba tum are most widely distributed. A very strong heterogeneity of the soil and cli mate conditions accounts for a considerable disparity in the list of alien species between various territorial districts of the FEFD. Many species that actively co lo nize southern districts do not occur in the north, or only individual plants of them are reported. The article is a step towards the preparation of the Black Book of the Russian Far East flora and the basis for making decision on prevention the economic and environmental damage of the natural biodiversity of the region.

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Rosa × archipelagica is a spontaneous hybrid between Rosa rugosa and R. maximowicziana distributed, together with its parental taxa, on the coast of a small Stenina Island in the Peter the Great Gulf, the Sea of Japan (Russian Far East). Its hybrid origin is confirmed by direct electropherogram comparisons of PCR products and maximum likelihood analyses of nuclear ITS 1–2 and plastid intergenic spacers trnH–psbA and ndhC–trnV. The plastome markers indicate R. maximowicziana as the maternal genome donor of Rosa × archipelagica, however, one specimen shows also signs of heteroplasmy. This is the first evidence of possible biparental inheritance of plastids in rose hybrids. The results do not show whether the hybrid plants all belong to F1 or further generations of hybrids.

Исследован онтогенез и морфогенез Nabalus ochroleucus в лесных и луговых местообитаниях южных районов Приморского края. Выделены группы и подгруппы j-, im-, v-, g-особей. В соответствии со стадиями онтогенеза идут модификационные преобразования всех структурных органов растений: листовых пластинок, побеговой и корневой систем. Жизненный цикл длится 4-5 лет. На первом этапе развития формируется розеточный полициклический побег (j-™-особи) с запасающей короткокорневищно-стержнекорневой системой, а на завершающем этапе - полурозеточный вегетативно-генеративный моноциклический побег (v-g-особи) с короткокорневищной системой с запасающими придаточными корнями. Структурно многолетняя подземная часть соответствует одноглавому каудексу, так как включает основание розеточного побега, гипокотиль и базальный участок главного корня. Ответвлений каудекса (каудикулов) у исследованных образцов не наблюдалось. Принципиальных различий в структуре корневых систем, надземных и подземных побегов между континентальными N. ochroleucus и N. tatarinowii, имеющими жизненную форму полурозеточного монокарпика с запасающей короткокорневищно-стержневой системой, и островными японскими видами N. acerifolius и N. tanakae не выявлено.

We studied the distribution and relationship with the indigenous supralitoral species of the North Atlantic species Cakile edentula (Bigelow) Hook. along the eastern coast of Primorye Territory. The C. edentula annual community usually occupies sandy beaches and outer ribs of front dunes free of vegetation. This species is also associated with different plant communities of beaches and dunes: S alsoletum komarovii , Elymo-Caricetum kobomugi , Elymo-Caricetum pumilae , Artemisio stellerianae-Leymetum mollis , and Leymo mollis-Glehnietum littoralis. Furthermore, it forms short-lived communities with Jacobea psedoarnica , Lathyrus japonicus , and Rosa rugosa in some parts of the coast, and also communities with Phragmites australis on salt marshes in the Tumen River estuarine zone. The functional traits of C. edentula leaves - volume of mesophyll cell, the number of chloroplasts per mm of leaf surface, the ratio of the total surface area cells to the unit leaf area (Ames/A), the total number of chloroplasts per cell - were investigated. The high values of the integral parameters of С. edentula leaf mesophyll are quite comparable to those of desert halophytes and 1.5-4 times are higher than the values reported for several of the Northeast Asian coastal species such as Artemisia stelleriana , Chorisis repens , Glehnia littoralis , Jacobea pseudoarnica , Lathyrus japonicus et al. According to its ecological strategy, C. edentula can be attributed to ruderal-stress-tolerant (RS) species. This study was based on standard phytosociological and physiological methods with examination of quantitative leaf anatomy.

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Scleria parvula subsp. tumanganica is described as a new subspecies from the Russian Far East. A description and digital images of the whole plants, nutlets, and inflorescence are here presented. The new subspecies differs from the type subspecies by subrounded disc-lobes, distinctly not separated, margin entire, not reflexed, and rounded shallow sinuses. Also, it is characterized by an isolated geographical range. The disjunction of S. parvula subsp. tumanganica range in Primorsky Krai from the finds of S. parvula in the central parts of Honshu Island, Japan, and North Gyeonggi Province, Republic of Korea, constitutes of 700–900 km. This new taxon resembles S. rugosa, S. mikawana, S. novae-hollandiae, S. thwaitesiana, and S. tessellata in habit, structure of inflorescence, nutlet size and shape, and disc form and its lobes. A comparative study of these species has been carried out. We uphold the recognized taxa S. parvula and S. tessellata as species, and provide an identification key.

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