This name is a synonym of Persicaria amplexicaulis (D.Don) Ronse Decr..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: J. Jap. Bot. 77: 73 2002.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:20006267-1.
This name was in version 1 of The Plant List, record kew-2676768, and has not been changed.