Sesuoium longifolium Humb. & Bonpl. ex Willd., Enum. Pl. [Willdenow] 1: 521. 1809, syn. nov.

— TYPE: South America [America meridionali]. Humboldt & Bonpland s. n. (herbarium not known). Lectotype: A. Stübel 16 (B, B 10 0390978!), designated here.