The plant of Lythrum (Lythraceae). Scientific name Rotl rotundifolia. folia + rotundi [round] [leaves] (floating leaves are round leaf) that meaning. It is a narrower leaves than the conventional type, yellow to yellow-orange leaves. Stem is brown to reddish-brown, cross opposite leaf arrangement is not at three or four wheeled students, circle head, and all edges, sessile, leaf shape is oblong to lanceolate. Training is easy as usual rotundifolia, acidic-alkaline, liquid fertilizer mainly fertilizer, CO2 addition, 60 cm in easy-to-develop in 3-light environments.