Water hyacinth are a free-floating tropical perennial plant . The dark green leave blades are circular to elliptical in shape attached to a spongy, inflated petiole.
Underneath the water is a thick, heavily branched, dark fibrous root system. The water hyacinth has striking light blue to violet flowers...(click on product image for more details)
Water lettuce are a free-floating tropical plant with many spongy, dusty green simple leaves. The leaves are covered in very fine hairs and arranged in a spiral pattern from the center of the plant. Some people also refer to it as water cabbage.
The leaves are 1 to 6 inches wide and have large veins...(click on product image for more details)