Abstract
The research results of Pontechium maculatum (L.) Böhle & Hilger distribution in Dvorichansky National Nature Park "(hereinafter NPP" Dvorichansky "), which have been carried out throughout 2020 – 2021 are described. P. maculatum is included in the international conservation lists, namely in the European Red List of Vascular Plants (IUCN), Resolution №6 of the Berne Convention, and in some regional red lists. During the period of our research, we have registered 9 plots with P. maculatum populations. Among them we indicated 73 plants in 24 localities where the populational conditions, the phenological phase of plants development, the number of flowering individuals and the number of flowers on the plants were observed. Also, the peculiarities of natural habitats and biotope affiliation of P. maculatum are analyzed.
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