| australia | | hydrocotyle bonariensis | species | 1 | 0 |
| australia | | hydrocotyle pedicellosa | species | 1 | 0 |
| australia | | hydrocotyle verticillata | species | 1 | 0 |
| australia | queensland | hydrocotyle pedicellosa | species | 3 | 0 |
| brazil | rio grande do sul | hydrocotyle bonariensis | species | 1 | 0 |
| canada | british columbia | hydrocotyle ranunculoides | species | 1 | 0 |
| canada | nova scotia | hydrocotyle umbellata | species | 2 | 0 |
| canada | ontario | hydrocotyle americana | species | 4 | 0 |
| canada | quebec | hydrocotyle americana | species | 2 | 0 |
| china | | hydrocotyle sibthorpioides | species | 1 | 0 |
| india | andaman and nicobar islands | hydrocotyle javanica | species | 87 | 0 |
| india | tamil nadu | hydrocotyle conferta | species | 1 | 0 |
| india | tamil nadu | hydrocotyle javanica | species | 1 | 0 |
| india | tamil nadu | hydrocotyle sibthorpioides | species | 1 | 0 |
| india | tamil nadu | hydrocotyle sp. karuppusamy 24375a | species | 1 | 0 |
| japan | | hydrocotyle maritima | species | 1 | 0 |
| japan | | hydrocotyle ramiflora | species | 1 | 0 |
| japan | | hydrocotyle yabei | species | 1 | 0 |
| new zealand | | hydrocotyle hydrophila | species | 1 | 0 |
| new zealand | | hydrocotyle novae-zealandiae | species | 2 | 0 |
| new zealand | | hydrocotyle robusta | species | 1 | 0 |
| nicaragua | | hydrocotyle umbellata | species | 1 | 0 |
| portugal | | hydrocotyle vulgaris | species | 2 | 0 |
| sri lanka | | hydrocotyle verticillata | species | 7 | 0 |
| tanzania | | hydrocotyle nepalensis | species | 1 | 0 |
| united states | florida | hydrocotyle umbellata | species | 1 | 0 |
| united states | florida | hydrocotyle verticillata | species | 1 | 0 |
| united states | kentucky | hydrocotyle umbellata | species | 1 | 0 |
| united states | virginia | hydrocotyle umbellata | species | 3 | 0 |