All of the following aquatic plants are entomophilous EXCEPT

In a majority of aquatic plants such as water hyacinth, water lily, and lotus, the flowers emerge above the level of water and are pollinated by insects or wind. These plants are entomophilous or anemophilous.

Vallisneria is a submerged dioecious aquatic plant where pollination occurs on the surface of water. The female flower reaches the surface of water by a long stalk and the male flowers or pollen grains are released onto the surface of water. They are carried passively by water currents. This type of pollination is known as epihydrophily.

Therefore, Vallisneria is not entomophilous.

Answer: Vallisneria