Descobri este site que fala destas sementes https://buceplant.com/blogs/news/aquascaping-with-aquatic-seeds-journal-entries
Esta foi a conclusão final "Conclusion:
I am still unsure what species of plant these seeds are from but I don’t think its Glosso, HC or UG. Although I’m skeptical as to whether it will continue to thrive submerged, so far it has been two weeks with no signs of melt, deficiency, bleach, or die off. This has by far been the fastest growing carpet I’ve ever encountered. Even if the plant doesn’t survive for long under water, this project has been fun and I’d recommend it to anyone who wants to do a simple, cheap but potentially temporary Iwagumi aquascape or terrarium. "