Potamogeton lacunatus Hagstr.

Kapitonova, Olga A., 2020, Additions to the vascular flora of the Tyumen region, Western Siberia, Acta Biologica Sibirica 6, pp. 339-355 : 339

Potamogeton lacunatus Hagstr.

Material examined.

RUSSIA, Tyumen Reg. - Tobolsk distr. • 2.75 km NE of the microdistrict Mendeleevo (city of Tobolsk), site "Chistoe boloto", sandy quarry in 1.8 km E of Uvat tract; 58.3129°N, 68.3699°E; watered excavation; 1 Jul. 2019; IBIW. • southern outskirts of the village Baigara; 58.0266°N, 68.8422°E; lake on the right bank of the Irtysh River , shallow water near the shore, tightly; 3 Jul. 2019; IBIW (Fig. 1 ) .

Note.

The species differs from Potamogeton berchtoldii Fieb. by its spatulate upper leaves and a wide strip of lacunae, occupying the entire space between the central and lateral veins ( Papchenkov 2001, 2007). For the Asian part of Russia, the species was not previously recorded ( Durnikin 2012).

Figures

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.