Lemna trisulca Linnaeus
Lemna trisulca Linnaeus 
Lemna turionifera E. Landolt
Lemna turionifera E. Landolt 
Spirodela polyrhiza (Linnaeus) Schleiden
Spirodela polyrhiza (Linnaeus) Schleiden 
Key to plants of the farming and ranching areas of the Canadian prairies, A
Key to plants of the farming and ranching areas of the Canadian prairies, A 

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