Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Vallisneria is a genus of aquatic plant, commonly called eelgrass, tape grass or vallis. The genus has 6-10 species that are widely distributed, but do not grow in colder regions. 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 to the water surface on very long stalks. Tape grass fruit is a banana-like capsule having many tiny seeds. Sometimes it is confused with the superficially similar Sagittaria when grown submerged.