Northern Prairie Wildlife Research Center
Northeast Wetland Flora
Field Office Guide to Plant Species
Lemna perpusilla Torr.
- Family: Duckweed (Lemnaceae)
- Flowering: March-November
- Field Marks: The characteristics of this duckweed are the slightly asymmetrical bodies with
3 rather inconspicuous nerves and the winged sheaths of the root.
- Habitat: Shallow water.
- Habit: Tiny floating aquatic without true stems and leaves; solitary rootlet with a winged sheath; plant solitary or commonly remaining attached in groups of 2-3.
- Leaves: Body (thallus or frond) obovate to ovate, variable, asymmetrical, up to 1/8 inch long, about 1/2 as wide, inflated, obscurely 3-nerved, the upper surface weakly convex.
- Flowers: Microscopic, borne singly in pouches.
- Sepals: 0.
- Petals: 0.
- Stamens: 1.
- Pistils: 1.
- Fruits: Asymmetrical, ovoid to oblongoid, with a prominent persistent style.
- Notes: Duckweed bodies are eaten by waterfowl.
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