Northern Prairie Wildlife Research Center
Northeast Wetland Flora
Field Office Guide to Plant Species
Lemna minor L.
- Family: Duckweed (Lemnaceae)
- Flowering: July-August
- Field Marks: This duckweed has broadly oblong to nearly spherical bodies that are
obscurely 3-nerved. The tip of the rootlet is rounded.
- Habitat: Quiet water, ponds.
- Habit: Tiny floating aquatic without true stems and leaves; tip of solitary rootlet rounded.
- Leaves: Body (thallus or frond) obovate to elliptic, up to 1/3 inch long, nearly as wide, symmetrical or slightly asymmetrical, flattened to weakly inflated, obscurely 3-nerved; upper surface usually slightly convex;
lower surface flattened or weakly to moderately convex, pale green or occasionally reddish purple.
- Flowers: Microscopic, borne singly in pouches.
- Sepals: 0.
- Petals: 0.
- Stamens: 1.
- Pistils: 1.
- Fruits: Symmetrical, broadly ovoid; seeds longitudinally ribbed.
- Notes: The plant may be solitary or more commonly remaining attached in groups of 2-4.
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