Pistia stratiotes is a floating aroid and the only species in the genus.
Due to many differences it had been classified in 1943 to its own Pistiaceae family,
But as a result of the later research it was rejected.
Now it is in the subfamily Aroideae, tribe Pistieae.
| The IAS: Pistia|
David Scherberich: Pistia
Matyas Buzgó: Pistia