Stellaria fennica (Murb.) Perf.

Material examined.

RUSSIA, Tyumen Reg. - Tobolsk • microdistrict “Levoberezh'e”; 58.2193°N, 68.2146°E; left-coast floodplain of the Irtysh River, Like "Bol'shoe Dikoe", floating mat off the west shore, edge of the floating mat; 25 Jul. 2019 (Fig. 1) .

Note.

This species differs from the closely related Stellaria palustris Retz. by its narrow green leaves, shorter sepals and petals and the presence of small acute tubercles in the lower part of the stem (Tzvelev 2000, 2004).