Synonyms: Calacinum leptobotrys; Calacinum peruvianum; Calacinum tamnifolium (homotypic); Coccoloba carinata (homotypic); Coccoloba monoica (homotypic); Muehlenbeckia benthamii; Muehlenbeckia cuspidata (homotypic); Muehlenbeckia leptobotrys; Muehlenbeckia peruviana; Muehlenbeckia peruviana var. cuspidata; Muehlenbeckia quadrangulata (homotypic); Muehlenbeckia stuebelii; Muehlenbeckia tamnifolia f. tenuifolia; Muehlenbeckia tamnifolia quadrangulata; Muehlenbeckia tamnifolia var. hartwegii; Muehlenbeckia tamnifolia var. humboldtii; Muehlenbeckia tamnifolia var. laxiflora; Muehlenbeckia tamnifolia var. oligobotrys; Polygonum dombeyanum; Polygonum flexuosum (heterotypic); Polygonum leptobotrys; Polygonum quadrangulatum; Polygonum tamnifolium (homotypic); Polygonum tamnifolium var. xerocarpum; Sarcogonum tamnifolium (homotypic)