⚠ Version 1 of The Plant List has been superseded.

This name record (from Tropicos) is not included in version 1.1 of The Plant List. It is possible the same name is included from a different data source, to check this you can search for Polygonum hydropiperoides in version 1.1 of The Plant List.

Polygonum hydropiperoides var. psilostachyum H. St. John is a synonym of Persicaria hydropiperoides (Michx.) Small

This name is a synonym of Persicaria hydropiperoides (Michx.) Small.

The record derives from Tropicos which reports it as a synonym (record 26001550) with original publication details: Proc. Boston Soc. Nat. Hist. 36: 71 71 1921.

Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:206245-2.