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In connection with the critical revision of species of the genus Buglossoides Moench of Eastern Europe, Asia Minor and Central (Middle) Asia, herbarium materials in collections stored in the Herbariums of LE, MW, TASH, NSK, NS, TK, as well as virtual collections posted on the aggregator Global plants on JSTOR were studied. The revision of collections and new specimens made it possible to identify changes in the taxonomy and distribution of species of the genus Buglossoides, to describe a new species for science B.asiatica Ovczinnikova from Central Asia, and to cite new localities for three species: B.tenuiflora (L. f.) I.M. Johnst. is first recorded for Tajikistan, B.rochelii (Friv.) Stoyanov, Mátis et Sennikov is first recorded for Turkmenistan, and new locations of this species have been identified in Turkey and the Lower Volga Region: in the Volgograd, Voronezh and Saratov Regions. B. sibthorpiana (Griseb.) Czerep. is first recorded for the Lower Volga Region (Astrakhan Region) and the Republic of Dagestan. The summаry includes a nomenclatural citation for all taxa, citations of type specimens and new locations, information on ecological features and distribution, and a key to identifying the species. The description of B.asiatica includes a diagnosis, a table of diagnostic features of the new species and the species to which it was included, an illustration of the main features of the eremocarps, a photograph of the holotype and a range map.

The anthecological features of the polycarpic, bulbous, semi-rosette plant, Gagea minima (L.) Ker Gawl, were studied in the Moscow Region. Observations were carried out in 2021-2024 according to generally accepted methods. The flowers are weakly protandrous. There is a gradual opening of the anthers of all six stamens over 3 days. The duration of flowering of an individual flower is 4-8 days when an overlap of the staminate and stigma stages is observed. In the evening (after 18 pm) and under unfavourable conditions, the perianth closes and the flowers droop. The synflorescence is an open thyrsus, in which the number of axes of the second order (composed monochasia) is 1-3. The opening of flowers in the synflorescence as a whole and its structural units (monochasia) occurs in a clear sequence, according to the order of branching of the shoot on which the flowers are borne. In sunny and fairly warm weather, the flowering period of synflorescences is 6-8 days, while in cloudy and cool weather it increases to 12 days. According to the ratio of pollen grains and ovules in flowers (308 ± 18), G. minima is a facultatively autogamous plant. The plants display a morning opening rhythm with a maximum at 8 am. Flowers that bloomed the previous days open earlier than flowers that open for the first time.

According to the descriptions, the Siberian species Elymus peschkovae Tzvelev and E. confusus (Roschev.) Tzvelev (Triticeae, Poaceae) differ in the presence or absence of trichomes on the surface of lemmas and the segments of the spikelet axis (rachillas). Two methods were used for studying the microevolutionary relationships between these species: hybridization of biotypes from different locations and analysis of the nucleotide sequences of the low-copy nuclear gene GBSS1. The created and grown hybrids in combinations E. peschkovae × E. confusus: AMU-8804 × BER-0807 and AMU-8804 × BUK-1109 showed complete seed sterility in two field vegetations. In the interspecific hybrid E. confusus TAR-0730 × E. peschkovae JTO-1708, a single grain was found from which an absolutely sterile individual was grown. Taking into account the vast species ranges, three hybrids were created between Magadan biotypes from the same habitat in the combination E. confusus MOL-1887 × E. peschkovae MOL-1882. The plants showed seed fertility (SF) values of no more than 1-2 grains per spike. Five grown F₂ plants of this combination showed complete sterility. At the same time, intraspecific hybrids of E. confusus between biotypes from different geographical habitats in three cross-combinations showed a relatively high SF. In addition, a comparative study of the GBSS1 gene sequences in accessions from our collections was carried out compared with clones of reference species. Differentiation of clones by the St2 subgenome in E. confusus, E. peschkovae and E. sibiricus L. did not reveal any clear relationships between the species. At the same time, species specificity in the H1 subgenome was noted, confirming the existence of microevolutionary isolation of E. peschkovae and E. confusus. It was concluded that reproductive relationships between individuals of the two species are possible according to the model of introgressive relationships between E. fibrosus (Schrenk) Tzvelev and E. caninus (L.) L.

New syntaxa are described, validation and correction of associations are carried out. New data on the distribution of various syntaxa, their ecology and composition are given. Ass. Oxytropido tryphyllae-Stipetum glareosae Korolyuk, Sandanov et Chimitov ass. nov. (Suppl., Table 1, rel. 1-27) - polydominant short grass (Selaginella sanguinolenta, Stipa glareosa, Chamaerhodos altaica) petrophytic steppes of Northern Transbaikalia. D. s.: Carex pediformis, Gentiana decumbens, Gypsophila patrinii, Minuartia verna, Oxytropis triphylla, Phlojodicarpus sibiricus, Saussurea salicifolia, Stipa glareosa. Alliance Cirsio helenioidis-Cardaminion macrophyllae Chepinoga et Lashchinskiy all. nov. - streamside and riverside communities of mesohygrophytic plants of mountainous territories of South Siberia. D. s.: Cardamine macrophylla, Caltha palustris, Chrysosplenium nudicaule, Micranthes aestivalis. Alliance Cirsio helenioidis-Cardaminion macrophyllae Chepinoga et Lashchinskiy all. nov. Holotypus - ass. Cirsio helenioidis-Cardaminetum macrophyllae Chepinoga ass. nov. D. s.: Cardamine macrophylla, Caltha palustris, Chrysosplenium nudicaule, Micranthes aestivalis. The alliance unites tributary and riparian communities of mesohygrophytic plants of mountainous areas of South Siberia. Ass. Cirsio helenioidis-Cardaminetum macrophyllae Chepinoga ass. nov. (Suppl., Table 2, rel. 1-18) - the riparian communities of Cardamine macrophylla in the mountain forest zone of South Siberia. D. s.: Cardamine macrophylla, Cirsium helenioides. Ass. Cardamino macrophyllae-Calthetum palustris Lashchinskiy ass. nov. (Suppl., Table 3, rel. 1-14) - the riparian communities dominated by Caltha palustris in the sub-alpine zone and the upper part of the forest zone in the humid sectors of the South Siberian mountains. D. s.: Caltha palustris, Rumex alpestris. The class Montio-Cardaminetea on Sakhalin Island is represented by 3 associations subordinated to the order Angelico genuflexae-Cardaminetalia and the alliance Angelico genuflexae-Cardaminion scutatae. Ass. Caltho fistulosae-Macropodietum pterospermi Korznikov et Sheiko ex Korznikov ass. nov. - streamside communities of Sakhalin Island. D. s.: Caltha fistulosa, Cardamine yezoensis, Diphylleia grayi, Macropodium pterospermum, Trillium camschatcense. Syn.: Caltho fistulosae-Macropodietum pterospermi Korznikov et Sheiko 2018 nom. inval. (ICPN, Art. 3b). Ass. Caricetum augustinowiczio-sadoensis Okuda ex Korznikov ass. nov. - streamside communities of Sakhalin Island. D. s: Carex augustinowiczii, C. curvicollis, C. sadoensis. Syn.: Caricetum augustinowiczio-sadoensis Okuda in Miyawaki 1988 nom. inval. (ICPN, Art. 5a). Ass. Caltho-Lysichitonetum camtschatcensis Miyawaki et Fujiwara 1970 - along small streams in river valleys and swampy banks. Ass. Orostachyo spinosae-Limonietum suffruticosi Zolotareva ass. nov. (Suppl., Table 6, rel. 1-12) - halophytic communities with present of petrophytic spicies in thouth part of Chelyabinsk region. D. s.: Artemisia nitrosa (dom.), Limonium suffruticosum (dom.), Orostachys spinosa, Psathyrostachys hyalantha, Puccinellia dolicholepis. Ass. Sambuco sieboldianae-Fraxinetum mandshuricae ass. nov. - elm-ash forests in the valley of the Tym River on Sakhalin Island, belonged to the class Fagetea crenatae, the order Fraxino-Ulmetalia, the alliance Ulmion davidianae. D. s.: Adoxa moschatellina, Fimbripetalum radians, Ranunculus repens, Rosa amblyotis, Sambucus sieboldiana, Thalictrum minus. The article presents new data on the distribution of the association Philonotido fontanae-Montietum rivularis Büker et Tüxen in Büker 1942 (class Montio-Cardaminetea Br.-Bl. et Tüxen ex Klika et Hadač 1944) in Baikal region (Suppl., Table 5). The name of one association was mutated, i.e. Primulo auriculatae-Cardaminetum seidlitzianae Korotkov 1990 mut. Chepinoga nom. mut. nov. (orig. Primulo auriculatae-Cardaminetum raphanifoliae Korotkov 1990). The alliance name Angelico genuflexae-Cardaminion scutatae Ohba 1975 was amended (orig.: Angelico genuflexae-Cardaminetalia Ohba 1975) and lectotypified. The classes of halophytic vegetation Crypsietea aculeatae, Kalidietea foliati and Tamaricetea arceuthoidis are given for the first time for the Southern Urals. Ass. Crypsietum aculeatae Wenzl 1934 (Suppl., Table 7, rel. 1-5) - communities of saline habitats on the bottoms of shallow water bodies drying up in summer. D. s.: Crypsis aculeata (dom.). Ass. Limonio caspici-Halimionetum verruciferae Lysenko 2011 (Suppl., Table 8, rel. 1-4) - hyperhalophytic communities on low relief elements. D. s.: Halimione verrucifera (dom.), Limonium caspium. Ass. Kalidietum foliati Golub et Čorbadze 1989 (Suppl., Table 9, rel. 1-5) - hyperhalophytic communities on drying coasts of saline lakes. D. s.: Kalidium foliatum (dom.). Ass. Camphorosmo monspeliacae-Artemisietum nitrosae Lysenko et al. 2013 (Suppl., Table 10, rel. 1-8) -communities on dry solonetz soils. D. s.: Artemisia nitrosa (dom.), Camphorosma monspeliaca. Ass. Artemisio abrotanae-Tamaricetum ramosissimae ass. nov. prov. (Suppl., Table 11, rel. 1-2) - halophytic communities on saline coasts of lakes. D. s.: Tamarix ramosissima (dom.), Artemisia abrotanum.

Currently, the CSBG collection contains 27 cultivars of the genus Syringa L. The collection was replenished with 60 cultivars of the genus Syringa from 5 botanical institutions and nurseries located in other climatic zones from 2018 to 2022. New cultivars were planted in the scientific nursery of the laboratory of dendrology to study the features of biology, winter hardiness and subsequent introduction into urban greening in the continental climate of southern Western Siberia.

Data on yellow-green algae (Xanthophyta) from reservoirs and watercourses of the Azas State Nature Reserve has been processed and summarized. Lake Azas is located in the Todzhen basin of the Republic of Tyva, where representatives of this department currently count 10 species of algae. For the first time, 6 species are listed for water bodies of Tyva. Five species have been noted that have a limited distribution in Russia. Based on original and literary data, to date, 36 species have been identified in the water bodies of the Republic, represented by 39 species and infraspecific taxa from the Xanthophyta department, belonging to 7 families and 11 genera. The results of an analysis of data on the ecology and geographic distribution of representatives of this department are presented, and information is provided in relation to halicity, the active reaction of water, and saprobity.

Based on studies of the biota of macromycetes in the territory of the Kuzbass Botanical Garden, 53 species of larger fungi (macromycetes) were identified of higher fungi were identified. The identified species belonged to the divisions Ascomycota and Basidiomycota, 25 species being new records for the Kemerovo Region, and Inocybe salicis Kühner being reported for the first time in Asia. In terms of the number of species, basidiomycetes from the order Agaricales dominated. In the family spectrum, the leading position was occupied by Inocybaceae, Mycenaceae, Russulaceae, Agaricaceae. Among the genera, Inocybe (Fr.) Fr . and Mycena (Pers.) Roussel differed in species richness. In the ecological-trophic structure, the group of symbiotrophic fungi prevailed, the second position was occupied by the group of litter saprotrophs, and the third by humus saprotrophs, the remaining groups were represented by a small number of species. Analysis of ecotopic occurrence showed that most species are found in artificial plantings of the Botanical Garden.

The article is devoted to the 70th anniversary and 45th anniversary of scientific activity of Dmitry Nikolaevich Shaulo, a famous Russian florist, a tireless researcher of the mountains of southern Siberia, a specialist in the protection of the flora of Asian Russia, and the head of the Herbarium laboratory of the CSBG SB RAS

The article presents a brief overview of the results of the V International Youth Conference “Prospects of Development and Challenges of Modern Botany”, held at the Central Siberian Botanical Garden of the Siberian Branch of the Russian Academy of Sciences (Novosibirsk) and dedicated to the 300th anniversary of the Russian Academy of Sciences. The conference was attended by 98 young scientists from scientific organizations of Russia, Kazakhstan, Belarus, Tajikistan and Uzbekistan. A total of 6 plenary, 35 oral and 6 poster reports were presented.