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 pseudolacunatus Papch. Material examined. RUSSIA , Tyumen Reg . - Tyumen . • next to the intersection of street of "50 years of the VLKSM" and passage "Geologorazvedchikov" ; 57.1305°N , 65.5715°E ; Pond 'Utinyi' (the pond between school No 6 and railway); 12 Jul. 1994 ; I.V. Kuzmin leg. (Fig. 1 ) . Note. This is an hybrid between Potamogeton lacunatus Hagstr. and P. pusillus L. ( Papchenkov 2001 , 2007 ).