genus

Watermeals

Wolffia

Field notes

Wolffia is a genus of aquatic plants with a cosmopolitan distribution. They include the smallest flowering plants on Earth. Commonly called watermeal or rootless duckweed, these aquatic plants resemble specks of cornmeal floating on the water. They often float together in pairs or form floating mats with related plants, such as Lemna and Spirodela species.

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Range

United States

Greener is more native, amber more introduced; paler is less certain. How this was decided

Key traits

From USDA PLANTS.

Top native watermeals All

Native to the US, ranked by caterpillars, then bees and other hosts, food, flowers and shelter.