Synonyms: Persicaria clarkei; Persicaria dichotoma var. angustissima; Persicaria peduncularis; Persicaria tairae; Polygonum barbatum (heterotypic); Polygonum clarkei; Polygonum dichotomum (homotypic); Polygonum dichotomum var. angustissima; Polygonum dichotomum var. angustissimum; Polygonum glabratum; Polygonum imberbe; Polygonum pedunculare; Polygonum pedunculare angustissima; Polygonum pedunculare var. angustissimum; Polygonum pedunculare var. assamicum; Polygonum pedunculare var. nilagiricum; Polygonum pedunculare var. robustum; Polygonum strigosum pedunculare; Polygonum strigosum var. angustissimum; Polygonum strigosum var. pedunculare; Polygonum tairae; Polygonum tetragonum; Spermaulaxen dichotomus; Tracaulon pedunculare; Tracaulon tetragonum; Truellum dichotomum (homotypic)