Hydrocotyle ambigua
| Hydrocotyle ambigua (A. Gray) Britton et al., Prelim. Cat. 21. 1888, nom. illegit. et non Pursh 1814. | BASIONYM: Hydrocotyle canbyi J. M. Coulter & Rose 1887; Hydrocotyle umbellata Linnaeus, var. ambigua A. Gray 1867. | |
Hydrocotyle australis
| Hydrocotyle australis J. M. Coulter & Rose, Contr. U.S. Natl. Herb. 7: 28. 1900. | | TYPE: FLORIDA: Palm Beach Co.: Lake Worth, 8 May 1895, Curtiss 5376 (holotype: US). |
Hydrocotyle bonariensis var. tribotrys
| Hydrocotyle bonariensis Commerson ex Lamarck, var. tribotrys (Ruiz López & Pavón) G. Don, Gen. Hist. 3: 249. 1834, nom. illegit. | BASIONYM: Hydrocotyle polystachya A. Richard, var. triradiata A. Richard 1820; Hydrocotyle tribotrys Ruiz López & Pavón 1802. | |
Hydrocotyle canbyi
| Hydrocotyle canbyi J. M. Coulter & Rose, Bot. Gaz. 12: 103. 1887. | BASIONYM: Hydrocotyle umbellata Linnaeus, var. ambigua A. Gray 1867. | |
Hydrocotyle polystachya var. triradiata
| Hydrocotyle polystachya A. Richard, var. triradiata A. Richard, Ann. Gen. Sci. Phys. 4: 171. 1820. | BASIONYM: Hydrocotyle tribotrys Ruiz López & Pavón 1802. | |
Hydrocotyle tribotrys
| Hydrocotyle tribotrys Ruiz López & Pavón, Fl. Peruv. 3: 24, pl. 246(b). 1802. | | TYPE: PERU: |
Hydrocotyle umbellata var. ambigua
| Hydrocotyle umbellata Linnaeus, var. ambigua A. Gray, Manual, ed. 5. 190. 1867. | | TYPE: MARYLAND: |
Hydrocotyle fetherstoniana
| Hydrocotyle fetherstoniana Jennings, in Fetherston, Torreya 32: 7. 1932. | | TYPE: NEW YORK: Wyoming Co.: 1 mi. N of Washington Hunt, a few mi. E of Letchworth Park, cult. in New York, 2 Sep 1931, Fetherston s.n. (holotype: CM). |
Hydrocotyle prolifera
| Hydrocotyle prolifera Kellogg, Proc. Calif. Acad. Sci. 1: 15. 1854. | | |
Hydrocotyle racemosa
| Hydrocotyle racemosa Sessé y Lacasta & Moçiño ex de Candolle, Prodr. 4: 70. 1830. | | TYPE: MEXICO: |
Hydrocotyle trilobulata
| Hydrocotyle trilobulata Gandoger, Bull. Soc. Bot. France 65: 31. 1918. | | TYPE: MISSISSIPPI: |
Hydrocotyle verticillata var. fetherstoniana
| Hydrocotyle verticillata Thunberg, var. fetherstoniana (Jennings) Mathias, Brittonia 2: 240. 1936. | BASIONYM: Hydrocotyle fetherstoniana Jennings 1932. | |
Hydrocotyle verticillata var. longipedunculata
| Hydrocotyle verticillata Thunberg, var. longipedunculata Urban, in Martius, Fl. Bras. 11(1): 268. 1879. | | TYPE: PUERTO RICO: |
Hydrocotyle verticillata var. pluriradiata
| Hydrocotyle verticillata Thunberg, var. pluriradiata Urban, in Martius, Fl. Bras. 11(1): 268. 1879. | | |
Hydrocotyle verticillata var. racemosa
| Hydrocotyle verticillata Thunberg, var. racemosa (Sessé y Lacasta & Moçiño ex de Candolle) Mathias, Brittonia 2: 204. 1936. | BASIONYM: Hydrocotyle racemosa Sessé y Lacasta & Moçiño ex de Candolle 1830. | |
Hydrocotyle verticillata var. tenella
| Hydrocotyle verticillata Thunberg, var. tenella Urban, in Martius, Fl. Bras. 11(1): 268. 1879. | | TYPE: BRAZIL: Santa Catarina: |
Hydrocotyle verticillata var. tridecimnervis
| Hydrocotyle verticillata Thunberg, var. tridecimnervis Urban, in Martius, Fl. Bras. 11(1): 268. 1879. | | |