Species: ~ 15
Geography: cosmopolitic (not arctic nor subarctic).
- Lemna aequinoctialis Welw., (Lesser Duckweed, Schiefe Wasserlinse)
- Lemna gibba L. – (Gibbous Duckweed, Bucklige Wasserlinse)
-
Lemna minor L. - (Common Duckweed, Kleine Wasserlinse)
- Lemna minuta Humb., Bonpl. & Kunth – (Least Duckweed, Zierliche Wasserlinse)
- Lemna obscura (Austin) Daubs
- Lemna parodiana Giardelli
- Lemna perpusilla Torr. – (Minute Duckweed)
- Lemna trisulca L. – (Ivy Duckweed, Dreifurchige Wasserlinse)
- Lemna turionifera Landolt (Rote Wasserlinse)
- Lemna valdiviana Phil. – (Valdivia Duckweed)
- Lemna yungensis Landolt
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