[clarification needed] They have long creeping stems that often form dense mats, often in and near ponds, lakes, rivers, and marshes,[6] and some species in coastal areas by the sea.
[9][10] There are over 280 species recognised in the genus Hydrocotyle that grow in tropical and temperate regions worldwide.
[8] A few species have entered the world of cultivated ornamental aquatics.
[12] A list of selected species:[1][2][3][13][14][15][16] Hydrocotyleae grow in wet and damp places in the tropics and the temperate zones.
has been extracted from borehole samples of the Middle Miocene fresh water deposits in Nowy Sacz Basin, West Carpathians, Poland.