The biomorphological and вiochemical features of Monarda fistulosa L. cultivated in Kherson area are given in . The contents of essential oil in plant is determined. Its  localization togerter with oil glandulae size on leaves is studied. The comparative characteristics of the essential oil content  for  cv. Premyera and for other forms of Monarda fistulosa  is  discussed. Circadian dynamics of oil accumulation during different development phases is studied. It is established, that there are 20 components in the essential oil with the main component Thymol.

It is found, that the root system  in Cyperus esculentus introduced in Northern Black Sea Coast  consists of additional roots              with their absence both on suckersand rhizomes of the first order.

Lichens of 44 species are found from the territory of Akkerman medieval fortress,  with prevailing majority (31 species) of epilitic taxa. It is shown that the maximal amount of species  grows in microecotopes of moist and shaded fortress moat walls. Among the found species Physconia muscigena is new for the steppe zone of Ukraine.

In this article, the results of the investigation of separate stages in  reproductive process of the rare species Paeonia tenuifolia L. that grown short in quantity and has protective status are given. Peculiarities of fertilization, of endosperm and embryo development are found out. Calendar terms of this process flowing in the conditions of Crimea are given. This work is illustrated by microphotographs.

The list of the lichens and lichenocolous fungi of limestone outcrops of the nature reserve “YElanetsky step” includes 64 species lichens and 6 species lichenocolous fungi of 29 genera, 16 families, 6 orders and group mitosporic fungi. Toninia physaroides (Opis) Zahlbr., Stigmidium glebarum (Arnold) Hafellner, Zwackiomyces calcariae (Flagey)  Hafellner  & Nik. Hoffm. are firstly reported for Ukraine, Aspicilia farinosa (Flörke) Arnol,Clauzadea metzleri (Korber) D. Hawksw., Bacidina delicata (Larbal. ex Leight) V. Wirth et Vĕzda, Gonohymenia myriospora (Zahlbr.) Zahlbr., Hymenelia prevostii Koerb., Rinodina dubiana (Hepp) J. Steiner – for plain part of Ukraine, and Caloplaca polycarpa (A. Massal.) Zahlbr, Collema undulatum Laurer ex Flot., Lecanora xanthostoma CI. Roux ex Fröberg, Verrucaria macrostoma DC. – for steppe part of Ukraine. Data about ecology and frequency of occurrence of the lichens and lichenicolous fungi are provided.

Ecological and coenotic monitoring of plant cover on petrophytes variant of herb (forb)-bunch-grass steppe submitted in branch of Ukrainian Steppe Natural Reserve (Donetsk Region) are presents. For understanding of structural mechanisms and accompanying changes in ecotopes characteristics. The technique of computer synphytoindication was used. It promoted enough to the full characteristic of ecotope parameters under the most widespread forming features of reserve site. Sizes of ecological factors of the basic formations of reserve are designed.

The territory of Streltsovskaya Steppe was enlarged in 2004. As the result, the Natural Reserve includes lots of pasture areas and abandoned filds. Description of nine abandoned fields is given.  A general features of abandoned fields  distribution,  together with their soil, relief, history of economic  usage are elucidated.

The bryophyte flora of the Cheremys’ky nature reserve (the Volyns’ka oblast’, NW Ukraine) includes 114 species of 67 genera, 42 families belonging to two divisions: Marchantiophyta (12 spp.) and Bryophyta (102 spp.). Among them, glacial relicts (Calliergon trifarium, Scorpidium scorpioides, Helodium blandowii) and rare taxa (Orthotrichum lyellii, Aulacomnium androgynum, Thuidium tamariscinum) are presented.