Kingdom: Plantae (2635)
Phylum: Tracheophyta (2573)
Class: Liliopsida (389)
Order: Liliales (108)
Family: Pontederiaceae (5)(family description)
Genus: Heteranthera (1)
Epithet: oblongifolia Mart. ex Schult. & Schult.f. (1)
Synonym: Heteranthera hydrocleifolia Griseb.
oblongifolia => oblong leaves