To the study of vegetation and flora of the Cat Tien National Park (Socialist Republic of Vietnam)

The article presents the results of the study of the flora of the Cat Tien National Park (Socialist Republic of Vietnam). The territory of the park is located in the zone of tropical rainforests; 63% of the park surface is occupied by cleared evergreen (with the dominance of species of the genus Lagerstroemia in the upper canopy) and bamboo (Bambusa spinosa Roxb., B. bambos (L.) Voss and Schizostachyum virgatum (Munro) H.B. Naithani & Bennet.) forests. It was revealed that the flora of the park includes 1598 species of higher and spore plants from 753 genera and 173 families. Spore plants (Polypodiophyta, Lycopodiophyta) are represented by 99 species from 55 genera and 25 families. In the spectrum of the leading families, the following are in the lead: Fabaceae (125 species / 8% from the total number of flora species), Orchidaceae (120 / 8%), Rubiaceae (92 / 6%), Poaceae (73 / 5%), Malvaceae (57 / 4%), Phyllantiaceae (45 / 3%), Lamiaceae (45 / 3%), Euphorbiaceae (42 / 3%) и Cyperaceae (41 / 3%). The genera Dendrobium and Ficus are represented by the largest number of species, including 30 and 29 species, respectively. The rare fraction of flora includes 30 species from 17 genera and 11 families. The largest number of rare species are found in the Dipterocarpaceae family (9 species) and Fabaceae (7 species). 12 rare species of the park's flora are classified as "very vulnerable". There are 102 endemic species, including Cycas inermis Lour., Peliosanthes luteoviridis Vislobokov, K.S. Nguyen, Kalyuzhny, Nuraliev & N. Tanaka, Calamus dongnaiensis Pierre ex Becc., Impatiens rara Tardieu, etc. found in the park alone. The synanthropic fraction of flora, which includes plant species that have benefited from human anthropogenic activity and grow on disturbed lands (which account for 3.5% of the total area of the park), includes 149 species from 89 genera and 42 families; the level of synanthropization of the park's flora is 10%. The Poaceae family contains the largest number of synanthropic species (15 native and 14 adventitious), which, in our opinion, is due to the large areas of artificially created lands.

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