Greater Duckweed
Spirodela polyrrhiza
53.4757, 10.3673
Field Notes
Description:
It is a perennial aquatic plant usually growing in dense colonies, forming a mat on the water surface. Each plant is a smooth, round, flat disc one half to one centimeter wide. It produces several minute roots. It also produces a pouch containing male and female flowers.
Habitat:
worldwide, freshwater, ponds and lakes
Notes:
This Duckweed covered three entire ponds neaby - making a great atmosphere in the warm morning light.
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