Azolla rubra
| Azolla rubra | |
|---|---|
| Scientific classification | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Division: | Polypodiophyta |
| Class: | Polypodiopsida |
| Order: | Salviniales |
| Family: | Salviniaceae |
| Genus: | Azolla |
| Species: | A. rubra |
| Binomial name | |
| Azolla rubra R.Br. | |
Azolla rubra, known commonly as red azolla and Pacific azolla, is a species of aquatic fern native to Australia and New Zealand. In New Zealand, it is also known by its Māori names returetu, roturotu, kārearea and kārerarera.