This plant was introduced to the hobby as Tonina sp. 'Manaus', and in trade it is still sometimes found under that term. Cavan Allen found out that it truly belongs to the genus Syngonanthus. Christel Kasselmann compared plant samples to the isotype of Syngonanthus inundatus and found out that S. sp. 'Manaus' probably belongs to this species. There was no inflorescence, though, and thus the plant could not be identified safely. For this reason, a "cf." was added in front of the species name.
To be continued...
<a href="https://www.flowgrow.de/db/aquaticplants/syngonanthus-cf-inundatus" target="_blank"><img alt="Syngonanthus cf. inundatus" title="Syngonanthus cf. inundatus" src="https://www.flowgrow.de/db/widget/aquaticplants/syngonanthus-cf-inundatus" /></a>
[widget=aquaticplants/syngonanthus-cf-inundatus]Syngonanthus cf. inundatus[/widget]