| Lemna minuscula Herter, 1954 |
| Lemna minuta Kunth, 1816 |
| Lemna oblonga Phil., 1858 |
| Lemna obscura (Austin) Daubs, 1965 |
| Lemna polyrhiza L., 1753 |
| Lemna torreyi Austin, 1867 |
| Lemna trisulca L., 1753 |
| Lemna trisulca var. linearis Asch. & Graebn., 1904 |
| Lemna turionifera Landolt, 1975 |
| Lemna valdiviana Phil., 1864 |
| Lemna valdiviana var. abbreviata Hegelm., 1896 |
| Lemna valdiviana var. minima Hegelm., 1868 |
| Lemna valdiviana var. pellucida Hegelm., 1868 |
| Lemna valdiviana var. platyclados Hegelm., 1896 |
| Lemnoideae Bab., 1843 |
| Lenticula Hill, 1756 |
| Lenticula gibba (L.) Moench, 1794 |
| Lenticula polyrrhiza (L.) Lam., 1779 |
| Lenticula trisulca (L.) Scop., 1772 |
| Lysichiton Schott, 1857 |