Interesting info

Green duckweed is frequently found covering still waters.

Here, it surrounds the knees of a bald cypress.

See yellow water buttercup for a closer view.

You ought to know

Height: Aquatic

Frequency:Sometimes blankets cypress swamp and overcup oak slough

Blooms: I don't know if this plant flowers

Range: Also found from New England to Minnesota and from Virginia to Louisiana and Texas