Vallisneria 

Vallisneria americana

Also known as: tape grass, eel grass. 

Also known as: tape grass, eel grass. 

Vallisneria is a submersed plant that spreads by runners and sometimes forms tall underwater meadows. Leaves arise in clusters from their roots. The leaves have rounded tips, and definite raised veins. Single white female flowers grow up to the water surface on very long stalks. Tape grass fruit is a banana-like capsule having many tiny seeds. Vallisneria has been spread from the aquarium industry.