The paper presents a classification of 1010 species, belonging to 296 genera and 84 families of wild melliferous plants. A particular attention is given to the characteristics of the conservational importance of these plants at national and international level. Two hundred and one of these species belonging to 71 genera and 36 families were considered to have some conservational status in Bulgaria and Europe. Many of them are endemics for Bulgaria and/or Balkan Peninsula and are protected by the national Bulgarian legislation or by international conventions ratified by Bulgaria. The results indicate that substantial part of melliferous plant species of the Bulgarian flora is of high conservation value.

New data on some critical taxa of Pinophyta in Ukrainian flora are given and discussed with presenting identification keys. Next taxa are treated:  Ephedra arborea Lag. – as synonym of E. distachya L., Pinus pallasiana Lamb. – as P. nigra J. F. Arnold subsp. pallasiana (Lamb.), P. pityusa Steven var. stankewiczii Sukacz. – as P. brutia Ten. var. pityusa (Steven) Silba.; P. sylvestris L. – as divided into three varieties: var. sylvestris, var.cretacea Kalen. ex Kom. and var. hamata Steven; P. mugо Turra – as divided into two subspecies: subsp. mugo and subsp. rotundata (Link) Janen. et H. Neumayer; Larix decidua Mill. – as divided into two varieties: var. decidua andvar. polonica (Racib. ex Wóycicki) Ostenf. et Syrach; Juniperus oxycedrus L. replaced by J.deltoides R.P. Adams, J. communis L. – as divided into two varieties: var. communis and var. saxatilis Pall.; Platycladus orientalis (L.) Franco is given as naturalized in Ukraine for the first time.

Populations of Seseli lehmannii Degen, arare endemic plant, were studied in the Crimea with giving data on distribution, morphological, ecological features of the species, agestructure of population and reasons for decreasing number of individuals.

The inflorescence structure of relictual species Silene jailensis, endemic  to the Crimean Montains  was studied. Initially, S. jailensis has dichasial cyme with seven flowers.. The impoverished cymes with three flowers fully dominate in plants in situfor the reason of the lack of summer warmth for proper generative development of plant.

A degree of the outphytosozologiсal representativeness is assessed for nine man-made protected objects of the Forest-steppe zone of Ukraine.

The list of bryophyta species of LivoberezhnePolissja (  within the limits of Kiev, Chernigov and Sumy regions of Ukraine) is given. For each species the place and time of collection and short characteristics of habitats, collectors are pointed out. Besides the author's materials, herbarium data (KW, KHER) are presented, which were looked through by the author of the article as well as literature data. The species are ranged according to the system, adopted in the Checklist of Bryophyta of Ukraine (2008).

The importance of soil algae for soil restoration is elucidated. The systematic and ecological structure of algae-flora on arboreal plantings in the revegetated coal dump of mine Svyato – Serafimivs’ka (Donetsky region) is studied. The dominant species of algae coenoses and Jakkar index is determined. A checklist of soil algae-flora is is made that includes 30 species from five divisions: Cyanophyta – 2 sp. (7%), Chlorophyta – 22 (73%), Xanthophyta – 1 (3%), Bacillariophyta – 3 (10%), Eustigmatophyta – 2 (7%).

Data on 8 new to Ukraine species of lichenicolous fungi Dacampia cladoniicola Halıcı & A.Ö. Türk, Dactylospora rimulicola (Müll. Arg.) Hafellner, Didymellopsis latitans (Nyl.) Clem. & Shear, D. pulposi (Zopf) Grube & Hafellner, Lichenoconium pyxidatae (Oudem.) Petrak et H. Sydow, Polycoccum teresum Halici et K. Knudsen, Zwaсkhiomyces diederichii D. Hawksw. & Ittur., Z. dispersus (J. Lahm et Körb.) Triebel et Grube are provided.