Group: Spermatophytina (Spermatophytes)
Family: Polygonaceae (Knotgrass family)
Genus: Polygonum (Knotgrass)
Polygonum oxyspermum Ledeb. - Ray's Knotgrass
Polygonum raii Bab. - Ray's Knotgrass
Polygonum aviculare agg. - Knotgrasses
Polygonum aviculare L. - Knotgrass
Polygonum depressum Meisn. - Equal-Leaved Knotgrass