RARE SPECIES OF POACEAE OF MIDDLE AND LOWER VOLGA BASIN

Saksonov Sergey Vladimirovich, Doctor of biological sciences, professor, deputy director for research, head of laboratory of phytodiversity problems, Institute of Ecology of Volga Basin of the Russian Academy of Sciences (10 Komzina street, Togliatti, Russia), svsaxonoff@yandex.ru
Vasjukov Vladimir Mikhailovich, Candidate of biological sciences, researcher, laboratory of phytodiversity problems, Institute of Ecology of Volga Basin of the Russian Academy of Sciences (10 Komzina street, Togliatti, Russia), vvasjukov@yandex.ru
Rakov Nikolay Sergeevich, Candidate of biological sciences, associate professor, researcher, laboratory problems phytodiversity, Institute of Ecology of Volga Basin of Russian Academy of Sciences (10 Komzina street, Togliatti, Russia), svsaxonoff@yandex.ru
Senator Stepan Aleksandrovich, Candidate of biological sciences, researcher, laboratory of phytodiversity problems, Institute of Ecology of Volga Basin of the Russian Academy of Sciences (10 Komzina street, Togliatti, Russia), stsenator@yandex.ru

581.9

Background. Flora of the Volga basin includes more than 4000 species of vascular plants (native and adventitious), about 1000 of them are included in the regional Red Books and required conservation within regions or the basin as a whole. The species revision is necessary to identify their rarity and to substantiate their inclusion in the Red Book of the Volga River Basin.
Materials and methods. Based on the results of own researches, herbarium data (LE, MW, PKM, PVB, VOLG, UPSU etc.) and literary sources, revision of one of the largest families of the flora of the Middle and Lower Volga – Poaceae – was carried out.
Results et conclusions. In the Red Books of the republics and regions of the Middle and Lower Volga there are 93 species of the family Poaceae included. 35 species are recommended for inclusion in the Red Book of the Volga River Basin, including 31 species of regional Red Data Books – 7 of them placed in the Red Data Book of the Russian Federation (2008): Diandrochloa diarrhena, Koeleria sclerophylla, Stipa dasyphylla, S. pennata, S. pulcherrima, S. zalesskii, Zingeria biebersteiniana – and 4 new species recently registered on the territory of the Middle Volga region (endemics or subendemics of the Volga Basin): Festuca spryginii, Koeleria spryginii, K. transvolgensis, Poa saksonovii.

rare species, Poaceae, Red books, including her-Volga, Lower Volga, Volga basin.

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