Additions to the vascular flora of the Tyumen region, Western Siberia Author Kapitonova, Olga A. https://orcid.org/0000-0002-6618-7029 Tobolsk complex scientific station of the Ural branch of the Russian Academy of Sciences, 626152, Russia, Tyumen Region, Tobolsk, 15 Academic Yu. Osipov St kapoa.tkns@gmail.com text Acta Biologica Sibirica 2020 2020-10-05 6 339 355 http://dx.doi.org/10.3897/abs.6.e52696 journal article http://dx.doi.org/10.3897/abs.6.e52696 2412-1908-6-339 9FF763A6E92E47F5A081FB6648E1AE7A BF0606D3FEDD5165BD1AD6C2DD4921AE 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 ). Figure 1. The locations of the species cited in the article. The numbers in circles denote the locations of the following species: 1 - Potamogeton x acutus , Potamogeton tenuifolius , Utricularia ochroleuca ; 2 - Potamogeton lacunatus ; 3 - Potamogeton lacunatus , Utricularia australis ; 4 - Potamogeton x pseudolacunatus ; 5 - Stellaria fennica , Utricularia australis ; 6 - Cypripedium macranthos ; 7 - Pedicularis dasystachys , Ranunculus silvisteppaceus ; 8 - Stuckenia chakassiensis x S. macrocarpa , Elodea sanadensis , Zannichellia repens ; 9 - Impatiens glandulifera , Phragmites altissimus ; 10 - Phragmites altissimus ; 11 - Galega orientalis .