A beautiful useful plant for aquarists and pond-ers, the water lettuce can serve several purposes given moderate lighting, aerial moisture and temperature. For toughness, providing shade, and protection for young Pistia is hard to beat. Historically, difficulties with water lettuce culture have most to do with low humidity, over-illumination in aquariums and chilling in outdoor settings. Often paired and compared with water hyacinth (Eichhornia crassipes), water lettuce can also become a floating nuisance, clogging waterways if released to the wild. Do check with your State's wildlife laws concerning possessing these plants; and never place unnatural livestock where it can "get loose". Classification & Species of Use To Aquarists: Species name, describer, date: Pistia stratiotes LINNAEUS, 1753 is a member of the monocot Family Araceae, the arums; a group of much importance to aquarists. Other arums of note that you should recognize: Acorus, Agalonema, Anubias, Cryptocoryne, andLagenandra.