Potamogeton x acutus (Fisch.) Papch.

Material examined.

RUSSIA, Tyumen Reg. - Tobolsk distr. • 9.5 km E of Tobolsk, E of the “Tobolsk-Polymer” site; 58.2372°N, 68.4692°E; water channel, depth approx. 0.8 m; 17 Jul. 2019 (Fig. 1) .

Note.

This is a hybrid between Potamogeton berchtoldii Fieb. and P. pusillus L. (Papchenkov 2001, 2007).