Scientific Name: Azolla caroliniana
- Cluster of tiny fern-like leaves; leaves usually ½ to 1 inch across; leaves grey to green when young and rusty red when older.
- Small roots dangle beneath each leaf.
- The red phase resembles a Euglena bloom from a distance.
- Forms layer on surface that is at the will of the wind; may cover an entire pond if conditions are calm; heavy infestations can shade sunlight required for oxygen synthesis and fish productivity. Often found in association with duckweeds.