Find Typha angustata (Typha L., Typhaceae) in the Delta of the Don River (Rostov Region)

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Abstract

The data on the discovery of the cornucopia of the narrowed Typha angustata in the delta of the Don River are given. In the “Flora of the USSR” this species was understood quite broadly, its range stretched from the Danube to the Pacific Ocean. For a long time, it was not found and was referred to as synonymous with T. australis, T. domingensis T. angustifolia. The species has not disappeared from the composition of the hydrophilic flora of Russia. It is preserved in the “arms” of the Delta of the Don River. As a result of isolations in the Cenozoic, which led to the severance links with the eastern and western water basins, the range was significantly reduced and the rate of evolution was reduced. In the modern geological period, T. angustata is undergoing natural elimination.

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About the authors

A. N. Krasnova

Papanin Institute for Biology of Inland Waters, Russian Academy of Sciences

Author for correspondence.
Email: krasa@ibiw.ru
Russian Federation, Borok, Nekouzskii raion, Yaroslavl oblast

T. N. Polshina

Southern Scientific Center, Russian Academy of Sciences

Email: krasa@ibiw.ru
Russian Federation, Rostov-on-Don

References

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2. Fig. 1. Micrographs of flowers and seeds of Typha angustata: a — drawing of the flower structure from the work (Kronfeld, 1889); b — Typha angustata in the coasts of the Don Island, the delta of the Don River; c - fragments of stem leaves from the outer and inner sides with wart glands; d–l — micrographs of flowers and seeds from the delta of the Don river, Rostov region; m–u — micrographs of flowers and seeds from Moldova, railway station Bykovets, boloto, T.S. Heydeman, 06/29/1948, No. 77635.

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