This name is a synonym of Rumex dentatus L..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 26000110) with original publication details: Beib. Bot. Jahr. 49(2): 19 1932.
This name was in version 1 of The Plant List, record tro-26000110, and has not been changed.