The first records of two species of orchids in the forest plantation on the Black Sea coast are reported. These are the southernmost locality of Cephalanthera damasonium (Mill.) Druce in Ukraine (except Crimea) and the first indication of Platanthera × hybrida Brühher on the mainland of Ukraine. Population of C. damasonium consists of 115 plants; it has right-handed ontogenetic spectrum with predominance of generative individuals; according to the delta–omega classification, it is adult, with depressive vitality structure. Generative plants form 4.3 ± 0.1 flowers per shoot. Population of P. × hybrida consists of 212 plants; it has right-handed ontogenetic spectrum with predominance of adult vegetative individuals; according to the delta–omega classification, it is young, with depressive-equilibrium vitality structure. Generative plants form 16.7 ± 0.1 flowers per shoot. For preservation of C. damasonium, it is necessary to close recreation area; for protection of P. × hybrida, maintaining of the present state of the ecosystem is needed.

Keywords: Cephalanthera damasonium, Platanthera × hybrida, floristic discovery, population structure, NNP Tuzlovski Limany, Odesa Region

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