Date de publication : Flora, 26(45): 763. 1843 [17/12/1843, fide p. 751].

Description originale : Hydrocotyle scaposa. Steud. nr. 291. (DeC. Sect. 1. §. 1.)
Caule (forsan nullo); foliis radicalibus longissime petiolatis, petiolo basi radicante, orbicularibus undulato-crenatis glaberrimis 20-nerviis, nervis marginem versus divisis anostomosantibus; pedunculo longissimo (ultra pedali) solitario (?) apice umbellifero semel prolifero; mericarpiis compressis unicostatis glabris. (Distinctissima species: caulis videtur aquae submersus emittens petiolos pedunculosque solitarios longissimos.)

Type : Suriname, F.W.R. Hostmann & A. Kappler 392 (HT: P00115399 [ex hb. Steud.]; IT: G00366917 [ex hb. Moric.], M0172686, P00115400).