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

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.