Lemna obscura (Austin) Daubs in Illinois Biol. Monogr. 34: 20-21. 1965 sec. Espejo-Serna & López-Ferrari 2008
- ≡Lemna minor var. obscura Austin, Man. Bot., ed. 5: 479. 1867 syn. sec. Espejo-Serna & López-Ferrari 2008
- =Lemna minor var. colorata Hegelm., Lemnac.: 144. 1868 syn. sec. Espejo-Serna & López-Ferrari 2008