In the summer, during expedition visits, scientists of the Tylihulskyi RLP (Melnyk R.P., Hrubyi M.V.) described the vegetation of the locations of rare ephemeroids that were found during the spring expeditions. The grass stand changes during different periods of plant development.Therefore, the largest number of species is observed in summer. The steppe vegetation of the studied arroyos is based on the grouping of the Festuco-Brometea Br class.|-Bl. Festuco-Brometea) et R.Tx. in Br.BL 1949 (all. Festucion valesiacae Klika 1931 and Stipo lessingianae-Salvion nutantis Vynokurov 2016) with the dominance of turf and rhizome cereals Festuca valesiaca Gaudin (3 – on the Brown-Blanke scale), Stipa lessingiana Trin.& Rupr.(2), S. ucrainica P. Smirn. (3), S. capillata The grassland of the steppe areas where Adonis vernalis and Crocus reticulatus reticulatus grow is quite dense: 70-90%. These are the least disturbed areas that are confined to the placor (flat or with few forward extensions of water-sharing space) of the arroyo. The floristic richness of these steppe groups is directly dependent on the state of the soil on which their formation took place. The cenoelements (cenoelement- is an unspecified designation of any structural part or vegetation element of the zonal steppes) have been preserved on the slopes of the studied arroyos, in the flat zone, and quite rich groups have formed. Co-dominants in the studied groups are cereals: Koeleria brevis Steven (1) and Poa angustifolia L. (1). Agropyron pectinatum (L.) Gaertn.(1).
They include typical types of steppe herbs. In the first tier, tall plant species grow – Brassica campestris L. (1), Salvia nutans L. (1), Linum austriacum L. (1), Euphorbia seguieriana Neck. (1), Phlomis tuberosa L(1),.(1), Artemisia austriaca Jacq. (1), Potentilla astracanica Jacq.(1), Thymus × dimorphus Klokov & Des.-Shost. (+), JurineaaraсhnoideaBunge (+), Linaria genistifolia (L.) Mill. (+), Stachуs recta L. (+) and other. The second tier is represented by low herbs: Tanacetummilefolium(L.) Tzvelev (2), Teucrium polium L. (2), Helichrysum arenarium (L.) Moench (1), Haplophyllum suaveolens (DC.) G. Don f. (1), Goniolimon tataricum (L.) Boiss. (+), Linum tenuifolium L. (+), Eryngium campestre L. (r), Cephalaria uralensis (Murray) Roem. ex Schult. (+), Linum linearifolium (Lindem.) Jav.(+),etc. The third tier is formed by a small group of plants: Ephedra distachia L. (2), ViolaambiguaWaldst. et Kit. (1), Teucrium chamaedrys L. (+), Thymusdimorphus (1) ets.As part of these associations, there are from 25 to 55 species.
Galanthus elwesii and Gymnospermium odessanum (as mentioned earlier) in the spurs of the slope of the Atamanka arroyo among the shrubs. These xeromesophilic shrubs are classified as Rhamno-Prunetea Rivas Goday et Borja Carbonell ex Tüxen 1961. It includes shrub communities, mainly from representatives of the Rosaceae family, Rosaceae family.which are confined to ecotone areas between forest and steppe phytocenoses. The class is represented by the association Prunetum spinosae Tüxen 1952. It is common in humus-rich turf soils. The shrub layer is very thickened, dominated by Prunus spinosa (4),The closeness of shrubs is 80-95%. Dominant, Prunus spinosa (4), (4), Crataegus monogyna (2).In the second substage, Rosa canina (1) end R. corymbifera (+) grow. The projective coverage of the grass is insignificant (from 5% to 30%). Common types of association are Galium aparine L. (1), Aristolochia clematitis L.(+), Elytrigia repens (L.) Nevski (1), Poa angustifolia L.(1), Ballota nigra L. (2). Prunus spinosa (4), around Asparagus verticillatus L. (1).
Galanthus elwesii, growing in shrubs, reaches the thalweg of the arroyo, where in open areas the vegetation is more mesophytized and represented by the association Elytrigio trichophorae-Poetum angustifoliae Osychniuk et al. ex Solomakha 1995 (cl. Festuco-Brometea)). У травостої цих рослинних угруповань зростають злаки (перший ярус –заввишки 70-80 см) – Elytrigia repens (L.) Nevski (3), E. intermedia (Host) Nevski (2), Agrostis gigantea Roth (2), Alopecurus pratensis L.(1) end others. Also, a small number of species of high herbs occur: Lactuca tatarica (L.) S.A. Mey.(1), Melilotus officinalis (L.) Pall.(1), Carduus acanthoides L.(1)та ін. Невисоке різнотрав’яутворює другий ярус (30–40 см заввишки): Juncus compressus L.(1), Plantago major L. (+), and others. The third tier is up to 25 cm high: Medicado lupulina L. (1), Carex stenophylla Wahlenb.,Trifolium repens L. (2), T. fragiferum L. (+), Potentilla reptans L.(+), Taraxacum officinale Webb ex Wigg (+) and osthe .
Participants of the expedition:
- k.b.s., head of the scientific department of RLP "Tilihulskyi" Melnyk R.P.
- researcher of the Park Hrubiy M.V.