Vol 108, No 3 (2023)

The analysis of the distribution of mosses in the landscape of the western part of the Chukchi Highlands served as the basis for distinguishing 12 types of habitats, which differ in a number of abiotic (altitude above sea level, slope exposure, steepness, degree of surface moisture) and biotic (composition of dominant species, cover of mosses and vascular plants, percentage of ground area free of vegetation) parameters. The vast majority of habitat types are the slopes of various steepness (including accumulative slopes – plumes with runoff hollows), which are characterized by active movement of solid matter. Each habitat type is characterized by its own moss composition, or bryocenotype. The species richness in the bryocenotypes varies from 23 (mountain slopes with moving scree) to 65 (sloping valleys of plumes with reservoir runoff), the lowest average number of species was found in the tormer bryocenotype – 2.63, the highest – 6.67 – was noted in floodplain terraces. Based on 322 geobotanical relevés, there were identified 12 bryocenotypes, i.e. aggregates of moss species of the same habitat type. Five classes of species activity have been distinguished, based on 3 parameters: the number of habitat types where the species has settled, the constancy of the species in one type of habitat, the cover of the species. Of the 122 moss species noted in geobotanical relevés, 5 oned are classified as especially active (Aulacomnium palustre, A. turgidum, Dicranum elongatum, Distichium capillaceum, Hylocomium splendens, Sanionia uncinata, Tomentypnum nitens), 11 are highly active, 24 are medium-active, 30 are low-active and 52 are inactive.

The article presents new data on the vegetation of the island of Urup (Kuril Islands) obtained during the research of the authors in 2019 and 2021. The characteristics of the main forest communities (Erman’s birch forests, willow forests and Pinus pumila thickets), as well as rock and mire vegetation and vegetation of disturbed habitats, are given. The ecological-phytocenotic classification of the studied communities has been refined or carried out for the first time, the tables of geobotanical descriptions for a number of associations are given. Patterns of vegetation distribution in river valleys are considered. It is shown that in the northern part of the island, in the vegetation cover of the Pacific side, the role of mires and shrub communities increases in comparison with the Okhotsk Sea side. The description of soils is given in connection with the plant communities formed on them. The reasons of the revealed regularities are discussed, in particular, the influence of the relief, cold oceanic winds and fogs on the vegetation cover of the island.

The study of fruitlet morphology is carried out in 16 species of the genus Potentilla occurring in the Amur Region (Priamurye) and Primorye Territory. The sculpture of the fruitlet surface is shown to have diagnostic significance. The position, shape of the stylodium and the ratio of its length to the length of the fruitlet can be successfully used as diagnostic characters to distinguish the subgenera of the genus Potentilla. The inaccuracy of S.V. Yuzepchuk (1941) concerning the stylodia in the diagnoses of sections Niveae and Argenteae in the “Flora of the USSR” is corrected. The results of the research have shown that the stylodia in the species of these sections are short, rather thick, no longer than a mature fruitlet, instead of thin and long, as it was specified by S.V. Yuzepchuk. The presence of glands on the fruitlets of the members of section Pensylvanicae (P. approximata, P. conferta) can serve as a reason for the distinguishing this section within the subgenus Potentilla. The degree of expression of papillary outgrowths (short and long) in the lower part of the stylodium is a diagnostic trait of section Potentilla. The presence of covering hairs on the dorsal and ventral sides of the fruitlets in P. semiglabra, as well as a wide wing-like outgrowth on the dorsal side of the fruitlets in P. asperrima can be used in the taxonomy of the genus Potentilla as specific diagnostic traits. The species of Potentilla (P. amurensis, P. asperrima, P. centigrana) with a diploid set of chromosomes (2n = 14) are characterized by scarious and wing-like outgrowths on the fruitlets.

The report contains data on the first record of Botrychium matricariifolium (Retz.) A. Br. ex W.D.J. Koch in the Oryol Region (Central European Russia). The information on the geographical location and species composition of the plant comunity is given, some morphometric features and the total number of individuals in the population are indicated.

Представлены числа хромосом (2n) и уровень плоидности (nx), в соответствии с предполагаемым основным числом хромосом (x), для 35 видов, подвидов, нотовидов, а также гибридов из 17 родов семейства Asteraceae (Compositae): Aster (1), Amberboa (1), Carduus (1), Centaurea (4), Cirsium (1), Crepis (1), Erigeron (5), Hieracium (1), Hypochaeris (1), Leontopodium (1), Pilosella (1), Scorzoneroides (1), Solidago (9), Sonchus (2), Taraxacum (2), Tragopogon (2), и Tripleurospermum (1). Изучаемые экземпляры – происхождением из Европы (европейская часть России, Франция и Великобритания, включая ее коронные земли), Кавказа (Армения и Россия), Центральной Азии (Таджикистан), Сибири (Иркутская область и Республика Бурятия), Дальнего Востока России (Приморский край) и Северной Америки (США). Впервые число хромосом определено у Centaurea cheiranthifolia subsp. willdenowii (2n = 18 + 0–2B). Неизвестное ранее число хромосом (цитотип) установлено у Solidago × snarskisii (2n = 36). Для других таксонов были подтверждены ранее известные числа хромосом.

Статья продолжает серию публикаций о хранящихся в коллекции Ботанического института им. В.Л. Комарова РАН (LE) типовых и автентичных образцах названий водорослей. Собраны сведения об образцах, на которых основаны названия, обнародованные во второй половине XX века советскими и российскими альгологами Кирой Леонидовной Виноградовой, Юрием Евгеньевичем Петровым с соавторами, Александрой Архиповной Калугиной, Валентиной Федоровной Макиенко, Екатериной Ивановной Блиновой и Анной Дмитриевной Зиновой. Хранящиеся в типовой коллекции образцы собраны в российских континентальных, арктических и дальневосточных морях, а также в Тихом и Южном океанах: в Черном (8), Баренцевом (3), Белом (6), Чукотском (1), Беринговом (5), Охотском (5), Японском (12), Филиппинском (2) морях, из районов Курильских (5) и Южно-Шетландских (5) островов. В типовом гербарии хранится 53 образца, относящихся к 32 таксонам, действительно обнародованным вышеперечисленными авторами, в том числе 29 голотипов, 22 изотипа и 1 паратип. Оригинальный материал для трех таксонов (Hammatoidea murmanica Yu.E. Petrov, Rosenvingiella simplex K.L. Vinogr., Undariella kurilensis Yu.E.Petrov et Kussakin) не обнаружен. Также приведены сведения о 2 образцах двух недействительно обнародованных таксонов и 3 образцах двух неопубликованных таксонов. Кроме того, процитированы номера штрих-кодов 190 паратипов, трех оригинальных и одного автентичного образца из основной коллекции.

The 6th All-Russian Scientific Conference with international participation “Algae: issues on taxonomy, ecology and monitoring approaches” and the School for young scientists was held in the Zvenigorod Biological Station of M.V. Lomonosov Moscow State University, September 12–17, 2022. The conference was organized by the M.V. Lomonosov Moscow State University and the Institute of Plant Physiology named after K.A. Timiryazev RAS. 82 algologists from 30 scientific institutions of Russia, Belarus and Kazakhstan attended the conference. The main topics of the Conference: Taxon problems in algology: from morphology to molecular genetics, modern synthesis; Floristics and geography of algae: problems and modern approaches; Soil algocenoses; Structural and functional organization of planktonic and benthic algocenoses; Physiology and biochemistry of algae: theory and practical application; Algae in assessing the state and quality of the environment: modern approaches, results and prospects; Cultivation – algae as an object of biotechnology: theory and its implementation in practice; Paleoalgology and biostratigraphy. During the conference, 72 reports were presented, including 6 plenary and 16 posters.