"Spirodela polyrhiza" is a species of duckweed. It can be found nearly worldwide in many types of freshwater habitat. It is a perennial aquatic plant usually growing in dense colonies, forming a mat on the water surface.
Similar species: Water-plantains, Seagrass
By Matthew Beziat
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Uploaded Jan 7, 2023. Captured Jun 11, 2022 14:59 in 37J9+W3 Fort Meade, MD, USA.