Oxygonum acetosella Welw. species accepted

Oxygonum alatum Burch. species accepted

Oxygonum altissimum Germish. species accepted

Oxygonum annuum S. Ortiz & Paiva species accepted

Oxygonum atriplicifolium (Meisn.) Martelli species accepted

Oxygonum auriculatum R. A. Graham species accepted

Oxygonum buchananii (Dammer) Gillett species accepted

Oxygonum carnosum R. A. Graham species accepted

Oxygonum delagoense Kuntze species accepted

Oxygonum dregeanum Meisn. species accepted

Oxygonum ellipticum R. A. Graham species accepted

Oxygonum hastatum S. Ortiz species accepted

Oxygonum hirtum Peter species accepted

Oxygonum leptopus Mildbr. species accepted

Oxygonum limbatum R. A. Graham species accepted

Oxygonum lineare De Wild. species accepted

Oxygonum litorale R. A. Graham species accepted

Oxygonum lobatum R. A. Graham species accepted

Oxygonum magdalenae Dammer ex Peter species accepted

Oxygonum ovalifolium Robyns & E. Petit species accepted

Oxygonum pachybasis Milne-Redh. species accepted

Oxygonum quarrei De Wild. species accepted

Oxygonum robustum Germish. species accepted

Oxygonum sagittatum R. A. Graham species accepted

Oxygonum salicifolium Dammer species accepted

Oxygonum stuhlmannii Dammer species accepted

Oxygonum tristachyum (Baker) H. Perrier species accepted

Oxygonum schliebenii Mildbr. species accepted

Oxygonum subfastigiatum R. A. Graham species accepted

Oxygonum vanderystii Robyns species accepted

Oxygonum gramineum R. A. Graham species accepted

Oxygonum sinuatum (Hochst. & Steud. ex Meisn.) Dammer species accepted

Oxygonum tenerum Milne-Redh. species accepted

Oxygonum thulinianum S. Ortiz species accepted

Oxygonum pterocarpum Osborne & Vollesen species accepted

Oxygonum fruticosum Dammer ex Milne-Redh. species accepted