Where is duckweed commonly found?
Where can you find duckweed?
The duckweeds (genus Lemna) and related genera of the duckweed family (Lemnaceae) are the smallest flowering plants known. Individual plants consist of a single, flat oval leaf (technically a modified stem) no more than ¼ of an inch long that floats on the surface of still-moving ponds, lakes, and sloughs.       
Nine duckweed species occur in North America. Common duckweed (L. minor) is the most widespread species, ranging across Canada .