This name is a synonym of Polygonum senticosum (Meisn.) Franch. & Sav..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 26002401) with original publication details: Nat. Hist. 2(8): 427 1777.
This name was in version 1 of The Plant List, record tro-26002401, and has not been changed.