eight-stamened waterwort
Elatine hydropiper L.

Elatine hydropiper, known as eight-stamened waterwort, is a species of flowering plant in the family Elatinaceae. It was first described in 1753 and is native to regions including Quebec, North America, parts of Europe, and several areas in Asia.
Description
Elatine hydropiper is a flowering plant in the Elatinaceae family. It is distributed across regions such as Quebec, North America, Flanders, parts of Europe, and areas in Asia including Altay, Amur, and Buryatiya. The species was first published in 1753. It is commonly referred to as eight-stamened waterwort in English.
Other common names
eight-stamened waterwortoctandrous waterwort
Distribution
Quebec · Palaearctic · North America · Flanders · SE · NO · DK · CA · Altay · Amur · Austria · Baltic States · Belarus · Belgium · Bulgaria · Buryatiya · Central European Rus · Chita · Corse · Czechoslovakia · Denmark · East European Russia · Finland · France · Germany · Great Britain · Hungary · Ireland · Irkutsk · Italy
Synonyms
Potamopitys majorPotamopitys hydropiperRhizium curvumAlsinastrum gyrospermumAlsinastrum octandrumAlsine elatinaElatine conjugataElatine gyrospermaElatine hardyanaElatine hydropiperElatine hydropiper subsp. gyrospermaElatine hydropiper f. intermediaElatine hydropiper f. submersaElatine hydropiper f. terrestrisElatine majorElatine majusculaElatine nodosaElatine oederiElatine schkuhrianaElatine serpillifoliumElatine serpyllifoliaElatine siphospermaElatine spathulataElatinella hydropiperHydropiper majusElatine hydropiper var. gyrospermaElatine gyrospermaElatine hydropiper subsp. orthospermaElatine paludosa subsp. majorElatine hexandra subsp. major