''Staurogyne repens'' is a plant in the family

Acanthaceae Acanthaceae is a family (the acanthus family) of dicotyledonous flowering plants containing almost 250 genera and about 2500 species. Most are tropical herbs, shrubs, or twining vines; some are epiphytes. Only a few species are distributed in te ...

, native to Brazil and Guyana. It was formally known as ''Ebermaiera repens''. It is widely used as a tropical aquarium plant, where it grows as a bright green carpet at the bottom of the tank.

References

Flora of South America Aquatic plants repens {{Acanthaceae-stub