⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record tro-50089999, with some changes.

Polygonum muhlenbergii var. natans Wiegand is a synonym of Polygonum coccineum f. natans (Wiegand) Stanford

The record derives from Tropicos which reports it as a synonym (record 50089999) with original publication details: Rhodora 26(301): 3 3 1924.