Pistia stratoites vs hydrophyte

Pistia stratoites and hydrophyte both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pistia stratoites	Yes	No	No	No
hydrophyte	Yes	No	No	No

As nouns, hydrophyte is a hypernym of Pistia stratoites; that is, hydrophyte is a word with a broader meaning than Pistia stratoites:

Pistia stratoites: pantropical floating plant forming a rosette of wedge-shaped leaves; a widespread weed in rivers and lakes
hydrophyte: 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

Other hypernyms of Pistia stratoites include aquatic plant, hydrophytic plant, water plant.

Pistia stratoites (noun)	hydrophyte (noun)
pantropical floating plant forming a rosette of wedge-shaped leaves; a widespread weed in rivers and lakes	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