This plant has been known under the name Echinodorus latifolius for many years. It belongs to the group of Helanthium bolivianum (= Echinodorus bolivianus). It is often found in trade under other names, like "Echinodorus magdalenensis", however, those names might also refer to other varieties of Helanthium bolivianum.
As a submersed plant, Helanthium bolivianum "latifolius" is hard to discern from other plants from the group of H. bolivianum. Its leaf rosettes have an overall stiffer apperance than those of e.g. H. bolivianum "quadricostatus" (Echinodorus quadricostatus).
Its emersed form has narrowly lanceolate leaf blades with an acute tip (see picture 3), very much like emersed plants of Helanthium tenellum and H. bolivianum "angustifolius".
The petals of its flowers are slanting downwards (see fig. 92).
- To be continued -
<a href="https://www.flowgrow.de/db/aquaticplants/helanthium-bolivianum-latifolius" target="_blank"><img alt="Helanthium bolivianum "latifolius"" title="Helanthium bolivianum "latifolius"" src="https://www.flowgrow.de/db/widget/aquaticplants/helanthium-bolivianum-latifolius" /></a>
[widget=aquaticplants/helanthium-bolivianum-latifolius]Helanthium bolivianum "latifolius"[/widget]