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 50134288) with original publication details: Ann. Sci. Nat., Bot., sér. 7, 5: 239 1886.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:695428-1.
This name was in version 1 of The Plant List, record tro-50134288, and has not been changed.