Aquatic plant and Vallisneria spiralis

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

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

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