Synonyms: Heliotropium americanum; Heliotropium brasilianum; Heliotropium bridgesii; Heliotropium canescens (heterotypic); Heliotropium cinereum (heterotypic); Heliotropium decumbens; Heliotropium ellipticum; Heliotropium houstoni; Heliotropium humboldtianum; Heliotropium inundatum; Heliotropium inundatum f. ellipticum; Heliotropium inundatum var. chacoense; Heliotropium inundatum var. cubense; Heliotropium leptostachyum; Heliotropium longepetiolatum; Heliotropium longipetiolatum; Heliotropium procumbens (homotypic); Heliotropium procumbens var. procumbens; Heliotropium rigidulum; Heliotropium riparium (homotypic); Heliotropium willdenowii; Schleidenia elliptica; Schleidenia inundata; Schleidenia leptostachya; Schleidenia longepetiolata; Schleidenia longipetiolata