Scientific Name: Spirodela polyrhiza
- Tiny floating plant of 2 to 4 joined fronds that are usually more than 1/4 - inch wide; most fronds have a tiny red dot on one end; fronds egg-shaped to nearly round.
- Two or more roots dangle beneath each leaf frond.
- 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 small duckweed.