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{{Taxobox
| color = lightgreen
| name = ''Hydrocotyle''
| image = Hydrocotyle bowlesioides.jpg
| image_width = 240px
| image_caption = ''[[Hydrocotyle bowlesioides]]''
| regnum = [[Plant]]ae
| divisio = [[Flowering plant|Magnoliophyta]]
| classis = [[Dicotyledon|Magnoliopsida]]
| ordo = [[Apiales]]
| familia = [[Araliaceae]]
| subfamilia = [[Hydrocotyloideae]]
| genus = '''''Hydrocotyle'''''
| genus_authority = [[Carolus Linnaeus|L.]]
| subdivision_ranks = Species
}}
'''''Hydrocotyle''''' ([[Pennywort]]) is a genus of aquatic or semi-aquatic plants formerly classified in the family [[Apiaceae]], now in the family [[Araliaceae]]. At least two species are now classed as [[List of invasive species|invasive aliens]] following introductions outside of their normal range.
About 75(–100) species: tropical and temperate regions worldwide.
The leaves are generally orbicular, hence the common name.
==Ecology==
Occur in and near ponds, lakes, rivers, and marshes
==Selected species==
*''[[Hydrocotyle americana]]''
*''[[Hydrocotyle bonariensis]]''
*''[[Hydrocotyle bowlesioides]]''
*''[[Hydrocotyle hirsuta]]''
*''[[Hydrocotyle leucocephala]]''
*''[[Hydrocotyle moschata]]''
*''[[Hydrocotyle prolifera]]''
*''[[Hydrocotyle pusilla]]''
*''[[Hydrocotyle ranunculoides]]''
*''[[Hydrocotyle sibthorpioides]]''
*''[[Hydrocotyle umbellata]]''
*''[[Hydrocotyle verticillata]]''
*''[[Hydrocotyle vulgaris]]''
==External Links==
*[http://plants.ifas.ufl.edu/hydrpic.html Invasive Plants]
*[http://rbg-web2.rbge.org.uk/URC/bhutanumbels/Hydrocotyle.htm Flora of Bhutan]
*[http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=115990 Flora of China]
*[http://www.efloras.org/florataxon.aspx?flora_id=5&taxon_id=115990 Flora of Pakistan]
*[http://www.wetwebmedia.com/PlantedTksSubWebIndex/hydrocotyle.htm Pennywort]
[[Category:Araliaceae]]