Hydrocotyle

Hydrocotyle, sometimes called water pennywort,[4] Indian pennywort, dollar weed, marsh penny, thick-leaved pennywort and even white rot[5] is a genus of prostrate, perennial[6] aquatic or semi-aquatic plants formerly classified in the family Apiaceae, now in the family Araliaceae.[3]

Water pennyworts, Hydrocotyles, are very common.[clarification needed] They have long creeping stems that often form dense mats, often in and near ponds, lakes, rivers, marshes[4] and some species in coastal areas by the sea

Simple, with small leafy outgrowth at the base, kidney shaped to round. Leaf edges are scalloped. The leaf surfaces of Hydrocotyle are prime grounds for oviposition of many butterfly species, such as Anartia fatima.
sea.[7][8]

Flower clusters are simple and flat-topped or rounded. Involucral bracts Inconspicuous bracts at the base of each flower. Indistinct sepals.

Elliptical to round with thin ridges and no oil tubes (vitta) which is characteristic in the fruit of umbelliferous plants.[6]

The prostrate plants reproduce by seed and by sending roots from stem nodes.[9]