⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record kew-292720, with some changes.

Spirillus perfoliatus var. richardsonii (A.Benn.) Nieuwl. is a synonym of Potamogeton richardsonii (A.Benn.) Rydb.

This name is a synonym of Potamogeton richardsonii (A.Benn.) Rydb..

The record derives from WCSP which reports it as a synonym (record 292720) with original publication details: Amer. Midl. Naturalist 3: 17 1913.