This narrow-leaved creeping Hygrophila, allegedly from South America, was identified by Dieter Wasshausen (Smithsonian Institution, Washington) as Hygrophila lancea, a species from Asia. It is widely spread among hobbyists in the USA, but only recently also in Europe.
To be continued...
<a href="https://www.flowgrow.de/db/aquaticplants/hygrophila-lancea-araguaia" target="_blank"><img alt="Hygrophila lancea "Araguaia"" title="Hygrophila lancea "Araguaia"" src="https://www.flowgrow.de/db/widget/aquaticplants/hygrophila-lancea-araguaia" /></a>
[url=https://www.flowgrow.de/db/aquaticplants/hygrophila-lancea-araguaia][img]https://www.flowgrow.de/db/widget/aquaticplants/hygrophila-lancea-araguaia[/img][/url]
[widget=aquaticplants/hygrophila-lancea-araguaia]Hygrophila lancea "Araguaia"[/widget]