New data on plant species for the territory of Kharkiv Oblast and Homilshanski Lisy National Nature Park

The discovery of a new species for the flora of Kharkiv Oblast — Galium praeboreale Klokov (Rubiaceae) — is reported along with records of eight more species that have not been registered before in the Homilshanski Lisy National Nature Park and its vicinites: Euphorbia subtilis Prokh. (Euphorbiaceae), Carex tomentosa L. (Cyperaceae), Tragopogon podolicus (DC.) Artemcz. (Asteraceae), Arctium nemorosum Lej. (Asteraceae), Galeopsis ladanum L. (Lamiaceae), Centaurea apiculata Ledeb., C. pseudomaculosa Dobrocz. (Asteraceae), and Muscari neglectum Gus. ex Ten. (Hyacinthaceae). Phytocoenotic conditions of the investigated habitats are described. A description of the M. neglectum population is given. Literature data and materials of the herbarium of V. N. Karazin Kharkiv National University (CWU) are analysed in regard to the distribution of the identified species in the flora of Kharkiv Oblast. It is established that since the second half of the 20th century there have been no data on records of E. subtilis, C. tomentosa, T. podolicus, A. nemorosum, C. apiculate, and C. pseudomaculosa confirmed by herbarium collections. The species E. subtilis, T. podolicus, C. tomentosa, and G. praeboreale were found in the territory of Homilshanski Lisy National Nature Park. The first two species occur in phytocoenoses of natural meadows, whereas the other two occur in phytocoenoses of both natural and steppe meadows in the floodplain of the Siverskyi Donets River. In the territory of the national park, A. nemorosum was found on a forest path and on the edge of an oak forest on the right bank of Siverskyi Donets River, whereas G. ladanum occurs in ruderal vegetation of glades and forest roads of the sandy terrace on the left bank of the river. The species C. apiculata, C. pseudomaculosa, and M. neglectum were found only outside the park. Both species of Centaurea occur on grassy slopes, in ruderal vegetation at the bottom of an old clay quarry, on sides of dirt roads in south-western outskirts of the town Zmiiv, as well as on grassy slopes between the town Zmiiv and the village Haidary. A population of M. neglectum was also found in the south-western outskirts of Zmiiv. On a grassy slope planted by a forest strip, 115 generative individuals were found on an area of about 0.25 ha.