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Photographer: John Kohout
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Family Lemnaceae
Spirodela polyrrhiza (L.) Schleid.
giant duckweed, greater duckweed
Spirodela: from Greek speira, "a cord," and delos, "evident," meaning "visible thread" and referring to the roots
polyrrhiza: polys for "many, frequent, much;" rhiza for "roots"
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| Status: | Native |
| Plant: | floating perennial aquatic, clusters of several lobed leaves; stems none; 5-15 roots per leaf frond |
| Fruit: | reproduces by budding; new leaves staying attached to clump |
| Leaf: | irregular oval, green above, dark red below |
| Habitat: | wet; ponds, lakes |
| (Glossary) |
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 Schleid.&phog=Elizabeth H. Zimmerman&spcode=SPIPOL)
 Schleid.&phog=Linda Ellis&spcode=SPIPOL)
 Schleid.&phog=Paul Skawinski&spcode=SPIPOL)
