Polygonum viviparum var. macounii (Small ex J. M. Macoun) Hultén

Polygonum viviparum var. macounii (Small ex J. M. Macoun) Hultén is a synonym sensu FNA Ed. Comm., 2005 of:

Bistorta vivipara (Linnaeus) Delarbre, an accepted species name sensu FNA Ed. Comm., 2005.