Hydrocotyle bonariensis 1 Copenhagen Bot Garden 120919 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle bonariensis 2 Copenhagen Bot Garden 120919 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle bonariensis 3 Copenhagen Bot Garden 120919 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle bonariensis 4 Copenhagen Bot Garden 120919 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle callicarpa 1 D'Entrecasteaux Nat Park, Western Australia 110928 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle callicarpa 2 D'Entrecasteaux Nat Park, Western Australia 110928 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle cf callicarpa 3 D'Entrecasteaux Nat Park, Western Australia 110928 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle cf leucocephala 1 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle cf leucocephala 2 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle dissecta 1 Bergianska 030814 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle dissecta 2 Bergianska 030814 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle dissecta 3 Bergianska 030814 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle hispidula 1 Mandalay Beach W Walpole, Western Australia 110929 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle hispidula 2 Mandalay Beach W Walpole, Western Australia 110929 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle hispidula 3 Mandalay Beach W Walpole, Western Australia 110929 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle leucocephala 1 Arenal NP, Costa Rica 231206 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle leucocephala 2 Arenal NP, Costa Rica 231206 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle leucocephala 4 Arenal NP, Costa Rica 231206 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle leucocephala 6 Arenal NP, Costa Rica 231206 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle pilifera 1 Western Flora, Western Australia 110925 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle pilifera 2 Western Flora, Western Australia 110925 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle pilifera 4 Western Flora, Western Australia 110925 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle tripartita 1 Wattle Bay, Auckland NZ 151104 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle tripartita 2 Wattle Bay, Auckland NZ 151104 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle tripartita 3 Wattle Bay, Auckland NZ 151104 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle tripartita 4 Wattle Bay, Auckland NZ 151104 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle vulgaris 1 northern Fanö DK 080809 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle vulgaris 2 Skanörs Ljung Sk 130804 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle vulgaris 3 Skanörs Ljung Sk 130804 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle cf leucocephala 3 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle cf leucocephala 4 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle cf leucocephala 5 Bergianska 150527 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle leucocephala 3 Arenal NP, Costa Rica 231206 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle leucocephala 5 Arenal NP, Costa Rica 231206 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Hydrocotyle pilifera 3 Western Flora, Western Australia 110925 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).