Potamogeton tenuifolius Raffin.

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

Potamogeton tenuifolius Raffin.

Material examined.

RUSSIA, Tyumen Reg. - Tobolsk distr. • 9.5 km E of Tobolsk, E of the “Tobolsk-Polymer” site; 58.2200°N, 68.4718°E; channel along the railway, in front of the dam, shallow water; 19 Jul. 2019 (Fig. 1 ) .

Note.

This species differs from closely related Potamogeton alpinus Balb. by its smaller and narrower leaves ( Papchenkov 2007).

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.