The Mosaic plant (Ludwigia sedoides) belongs to the Onagraceae (the Evening primrose family). It is a perennial plant that is native to Brazil and Venezuela. This herb grows in standing waters, and it remains free floating with long stems (up to 120 cm long). The leaves are diamond-shaped, generally green, but its older leaves have the tendency to turn red. The flowers are four-petal 4-5 cm across, and the blooms last only one day. At night, the plant will tighten together and the leaves begin overlapping to form a shingled mat.