Secondary structures of ITS1 and ITS2 transcripts of Atocion hypanicum (Klokov) Tzvelev and A. compactum (Fisch. ex Hornem.) Tzvelev were reconstructed. The presence of a  unique nucleotide substitution in fourth helix of A. hypanicum ITS1 transcript, which lead to a disturbance in the secondary structure of the helix, strongly supported it as a separate operational taxonomic unit. The lack of CBC in obtained sequences of ITS2 from A. hypanicum and A. compactum confirmed the absence of genetic barriers for the taxa crossing. Phenotypical distinctions between A. hypanicum and A. compactum from Caucasus associated with bracts and the morphology of the uppermost leaves are demonstrated. The separate species status of A. hypanicum was confirmed.

The second checklist of bryophythes of Ukraine is given according to the contemporary taxonomical system in this edition (Checklist first published in 2008). The bryophytes (superdivision Bryobionta) refer to 3 divisions: Anthocerotophyta (4 species), Marchantiophyta (192 species), Bryophyta (653 species). Species are placed alphabetically. Modern Latin names and known synonyms are given to each species. Literature sources on the Ukrainian bryoflora, including those published long ago as well as of the latest decades, especially generalized works, are quoted here. Distribution of all the species both in physiogeographic plains zones and mountain landscapes: zone of mixed coniferous-deciduous forests (Ukraine Polissja), zone of deciduous forests (nemoral  zone), the Forest-steppe zone, the Steppe zone (with steppe  Crimea), Carpathian mountain region, Crimean mountain region  and administrative regions of Ukraine is shown. The indications about species which were not presented in the first Ukrainian Checklist of Briobionta (2008),  questionable species and species that were excluded from Ukrainian bryoflora are given.

Mycological research in the territory of Bugskiy Gard National Natural Park (Mykolaiv region, Ukraine) resulted in the detection of 64 species of obligate phytotrophic fungi of the orders Erysiphales (33 species) and Pucciniales (31 species). Fungi belonging to species Erysiphe prunastri, Phragmidium violaceum, Puccinia annularis, P. glechomatis and P. permixta are reported for the first time in the territory of Right Bank Steppe of Ukraine. Identified fungi parasitized 86 species of host plants belonging to 70 genera and 26 families. The list of the recorded fungi and their hosts is given in the article.

The anatomical and morphological features, consortial connections, and distribution of the new species for Ukraine mycobiota, Phaeosphaeria typharum (Desm.) L. Holm are studied. Species was found in last year's leaves of Typha latifolia L. It was established that the anatomical and morphological parameters for Ph. typharum are close to those of Phaeosphaeria eustoma (Fuckel) L. Holm. A number of differences between the species were identified. Analysis of the distribution of Ph. typharum showed that the species has a wide area of distribution and forms consortial connections with 31 species of herbaceous plants of 14 genera of 7 families, saprotrophicaly developing on dead leaves and stems. Most often Ph.typharum were associated with members of families Typhaceae and Poaceae. Environmental features of the species relating to the stages of ontogeny, of habitat, and its distribution, were discussed.

Data on the 22 new and rare species of lichens and lichenicolous fungi for the Left-Bank part of Ukraine from Seversky Donets River basin are given. Among them, Bacidia fraxinea Lönnr., Caloplaca sterilis Šoun, Khodos. & Vondrák, Fuscidea arboricola Coppins & Tønsberg, Intralichen baccisporus D. Hawsksw. & M.S. Cole, Xanthocarpia marmorata (Bagl.) Frödén, Arup & Søchting and Xanthoriicola physciae (Kalchbr.) D. Hawksw. are reported for the first time for the Left-Bank part of Ukraine. The other species, such as Caloplaca grimmiae (Nyl.) H. Olivier, Chaenotheca brunneola (Ach.) Müll. Arg., Ch. furfuracea (L.) Tibell, Coenogonium pineti (Ach.) Lücking & Lumbsch, Cyphelium notarisii (Tul.) Blomb. & Forssell, Dimelaena oreina (Ach.) Norman, Lichenothelia convexa Henssen, Protoparmeliopsis laatokkensis (Räsänen) Moberg & R. Sant, Placynthiella icmalea (Ach.) Coppins & P. James, Pyrenodesmia concreticola (Vondrák & Khodos.) Søchting, Arup & Frödén, Ramalina capitata (Ach.) Nyl., Rinodina guzzinii Jatta, Sarcogyne privigna (Ach.) A. Massal., Trapelia glebulosa (Sm.) J.R. Laundon, T. obtegens (Th. Fr.) Hertel and Xanthocarpia crenulatella (Nyl.) Frödén, Arup & Søchting are rare.

The data about 116 species of lichenized and 10 species of lichenicolous fungi of arboretum F.E. Falz-Fein Biosphere Reserve of “Askania-Nova” are given. 81 from them are new for reserve, 10 – excluded from list of lichen biota of this territory. Caloplaca substerilis Vondrák, Palice & van den Boom, Lecania sylvestris (Arnold) Arnold, Marchandiomyces corallinus (Roberge) Diederich & D. Hawksw., Polychidium muscicola (Sw.) Gray, Scytinium callopismum (A. Massal.) Otalora, P.M. Jørg. & Wedin – are a new species for Ukraine, and Candelariella faginea Nimis, Poelt & Puntillo, C. subdeflexa (Nyl.) Lettau, Flavoplaca dichroa (Arup) Arup, Frödén & Søchting, Verrucaria breussii Diederich & Van den Boom. are new for plain part of Ukraine.

The aim of study was to estimate resource funds of common reed and response of reed stands to harvesting in the Central Ukraine, within the national nature park “Pyriatynskyi”, and uncover possibilities and consequences of regular reed harvesting for rehabilitation and sustainable management practice of floodplain in the park. By sampling three large sites of reeds differed by duration of flooding we estimated morphometric values, above-ground air-dried biomass of reed and some rates of plant resource capacity. Results show that annual accumulation of reed biomass reaches low to upper medium values (2–17 t*ha.^-1) known in temperate Europe. To conserve wetlands, to keep the floodplain and natural habitats in stable ecological mode the conditions of reed harvesting are recommended. Admissible rates of utilization of common reed through winter harvesting were stated. Based on indicator values obtained on sample plots an expected yield was predicted. There was confirmed no significant response of reed stands to winter harvesting in the first growing year after harvesting.

The process of Paeonia tenuifolia L. ontogenesis is studied when cultivating in the Dendropark “Askania Nova”, Southern Ukraine steppe zone. The phenorhythmics, peculiarities of individual development and reproduction, morphometric parameters of vegetative and generative organs are established. The last are characterized by a very low (length of a petal and fruit), low (height of a plant and peduncle, petal width, length and width of the seed), and average (leaf’s length and width, the width of a fruit) levels of variability that indicates substantial adaptation of the species in the new growth conditions. It has been determined that Paeonia tenuifolia is characterized by full realization of annual and life development cycles. Plants are well-developed, regularly bloom and fruit and form a viable self-seeding. There is a tendency to form introduction population of the species.