The distribution of Bazzania in Pacific Asia excluding Malesia is surveyed. The taxonomic diversity in this genus increases from North to South, while the regional taxonomic composition of Bazzania is rather gradually changes and compared regions are distributed strictly along a latitudinal gradient on the DCA scatter plot. Particular attention is paid to the distribution of Bazzania in Vietnam, for which considerable data were obtained in recent decade. A list of Bazzania of Pacific Asia is provided with distribution by country, as well as more detailed species list for this genus in Vietnam. The world centers of Bazzania species diversity are located in Malesia and Melanesia, where the former is adjacent to Pacific Asia in the northwest. Bazzania siamensis comb. nov. is proposed, the species is treated as different from B. pearsonii with which it was synonymized before. A description and photographs of the species based on lectotype are provided.

The paper provides data on records of two new to Russia agaricoid species: Amanita betulae from the Krasnoyarsk Territory (Eastern Sayan) and A. coryli from the Republic of Altai. Species identity was confirmed by molecular phylogeny based on nrITS sequences. Detailed morphological descriptions, data on ecology and distribution of these species are provided. The morphological features matched the descriptions of type specimens, while the ecology of the specimens of Amanita coryli and A. betulae from South Siberia differed from the European collections.

The first data of a special study of freshwater lichens of the Mongun-Taiga massif are presented. The annotated list includes 23 species from 15 genera and 9 families. All species are new to the Mongun Taiga massif. Among them, Porpidia hydrophila and Staurothele areolata are new to the Republic of Tyva, Verrucaria praetermissa is a new record for Siberia. Data on the distribution and ecology of species are presented, and for representatives of Verrucaria, morphological features of the studied samples and differences from morphologically similar species are additionally discussed.

The Sette-Daban Range, about 650 km long, is the southernmost part of theVerkhoyansk Mountains System. The only information on the liverworts of the range so far has been based on the results of field research 2000–2001. The bedrock of the Sette-Daban Range consists mainly of limestone and dolomites, while the rest of the Verkhoyansk Mountains System is composed of acid rocks. Because of this, the flora of the liverworts of the Sette-Daban Range differs significantly in its species. The present research was carried out in 2015–2017 in the basins of the Vostochnaya Handyga and Sakkyryr rivers using the route method in different habitats throughout the vertical profile. The annotated list describes the growth conditions of each species and indicates the structures associated with reproduction. A total of 44 species were identified. Of these, Apopellia alpicola and A. megaspora are new for Yakutia, 22 species are new to the flora of the Sette-Daban Range, seven species are rare in the territory of Yakutia or in the mountains of the northeast of the republic (Arnellia fennica, Eocalypogeia schusteriana, Frullania subarctica, Lejeunea alaskana, Mannia triandra, Sauteria alpina, Scapania sphaerifera). Eocalypogeia schusteriana, Mannia triandra, and Scapania sphaerifera are included in List of Russian Protected Species, Lejeunea alaskana — in the Red Data Book of the Republic of Sakha (Yakutia). At present, 69 species are known for the liverwort flora of the Sette-Daban Range. Sette-Daban is the habitat and conservation area of many basiphilic and calcephilic liverworts, rarely found in the Verkhoyansk and Chersk Mountain systems.

First records for Russia of one colorless chrysophyte species, five species of desmid algae, and two species of lichens, first record for Georgia of one freshwater green alga, first record for the Republic of Kazakhstan of one yellow-green alga, first records for the Republic of Belarus of three species of myxomycetes, first record for the Republic of Azerbaijan of one species of lichens, and first records for regions of Russia: two species of siphonous yellow-green alga for the Krasnodar Territory and Nenets Autonomous Okrug, some species of basidiomycetes for the Arkhangelsk, Kemerovo, Kurgan, Novosibirsk, Omsk, Tyumen regions, Altai Territory, and Republic of Altai, four species of lichenicolous fungi for Samara and Tver regions, some species of lichens for the republics of Karelia and Tuva, Tver Region, and Altai Territory, some species of mosses for St. Petersburg, Kursk, Irkutsk, Voronezh regions, Republic of North Ossetia – Alania, and Kamchatka Territory are presented. The data on their localities, habitats, distribution are provided. The specimens are kept in the herbaria ALTB, BAK, GSU, IBIW, LE, MSK-F, NSK, OMSK, SMR, SVER, TBI, TOB, VU, YSU, in the Algae collection of the Department of Mycology and Algology of Biological faculty of Moscow State University, or Vaucheria collection of the Laboratory for Algology at the Papanin Institute for Biology of Inland Waters of the Russian Academy of Sciences. Sequences of ITS1-5.8S-ITS2 fungal nrDNA regions of some specimens have been deposited in the GenBank.

During the study of materials from Vietnam collected in 2011–2019 and stored in the herbarium of the Komarov Botanical Institute of the Russian Academy of Sciences (LE) we identified specimens of 15 species and four varieties of myxomycetes, which have not been previously reported for the country. Among them, Licea verrucispora, Paradiacheopsis fimbriata, Perichaena areolata, P. luteola, Physarum dictyosporum, Reticularia splendens, Stemonaria gracilis are reported for the first time in Southeast Asia. The data on their localities, habitats, substrate, and distribution are provided.

The list of lichens and allied fungi of the Novgorod Region is supplemented with 24 species. Fuscidea lightfootii and Taeniolella phaeophysciae are new to the North-Western European Russia. Altogether 395 species of lichens and allied fungi are currently known for the Novgorod Region. Arthonia vinosa, Chaenotheca gracilenta, Parmeliella triptophylla, and Sclerophora coniophaea are recommended for inclusion in the Red Data Book of the Novgorod Region.

This paper provides data on 26 new, rare, and interesting species of lichens discovered in the city of Moscow and Moscow Region during the field studies in 2014–2022, of which 21 species are new to the study area. Fellhaneropsis vezdae is new to the European part of Russia, and Briancoppinsia cytospora, Thelidium minimum, and Verrucaria inaspecta are new to the Central Russia. The list of lichens and allied fungi of the city of Moscow and Moscow Region currently includes 493 species.

Parmotrema subtinctorium is reported for the first time for the lichen flora of Russia from the Jewish Autonomous Region, south of the Far East. For the studied samples, a description of anatomy, morphology and secondary metabolites is given. The morphological features of the material from the south of the Far East and differences from related species are discussed. Information about the ecology of this rare species and its distribution is presented.

The paper provides the data on new records of 24 protected and two rare in St. Petersburg fungi, and on 15 basidiomycete species new to St. Petersburg (Amanita excelsa, Amylocystis lapponica, Antrodia hyalina, Dendrothele acerina, Granulobasidium vellereum, Hypochnicium wakefieldiae, Kneiffiella floccosa, Macrolepiota excoriata, Mycena erubescens, Psathyrella pygmaea, Rhizochaete sulphurina, Sidera vulgaris, Sistotrema raduloides, Skeletocutis stellae, Tricholoma matsutake). New data on mycobiota of some protected areas has been obtained. Amylocystis lapponica, Antrodia piceata, Skeletocutis stellae, Tricholoma matsutake are recommended for inclusion in the list of protected species of St. Petersburg.