⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record kew-2869531, and has not been changed.

Rumex aquaticus subsp. insularis Tolm. is a synonym of Rumex aquaticus subsp. arcticus (Trautv.) Hiitonen

The record derives from WCSP (in review) which reports it as a synonym with original publication details: Fl. Arct. URSS 158 1966.