Hydrophytic plant and Vallisneria spiralis

Hydrophytic plant noun - A plant that grows partly or wholly in water whether rooted in the mud, as a lotus, or floating without anchorage, as the water hyacinth.

Vallisneria spiralis and hydrophytic plant are semantically related. In some cases you can replace phrase "Vallisneria spiralis" with "Hydrophytic plant", this phrases are similar.

Vallisneria spiralis noun - Submerged aquatic plant with ribbonlike leaves; Old World and Australia.

Hydrophytic plant and Vallisneria spiralis are semantically related. You can use "Hydrophytic plant" instead a noun phrase "Vallisneria spiralis".