Stuckenia chakassiensis (Kaschina) Klinkova x S. macrocarpa (Dobroch.) Tzvel.

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

Stuckenia chakassiensis (Kaschina) Klinkova x S. macrocarpa (Dobroch.) Tzvel.

Material examined.

RUSSIA, Tyumen Reg. - Armizonsky distr. • 3.2 km E of village Poloe; 55.7418°N, 67.8280°E; Lake Sen'kovo , sandy-silty shallow water on the south shore; salinity of the water is 2.8 g /l; 30 Jul. 2019; IBIW (Fig. 1 ) .

Note.

This hybrid has intermediate characteristics between the parent species: the fruits are smaller than those of S. macrocarpa , and not all ovaries develop into fruits; there are subepidermal bunds of mechanical tissue in the leaves, as in S. chakassiensis ( Klinkova 2006; Kipriyanova and Bobrov 2016), but in lower numbers. The hybrid has also long peduncles - up to 23 cm in length (Fig. 2 , A, B).

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.

Figure 2. Stuckenia chakassiensis (Kaschina) Klinkova x S. macrocarpa (Dobroch.) Tzvel. A - Herbarium specimen from cited locality, B - fruits. Photo by author.