Limnobium spongia
Similar to Eichhornia crassipes (Mart.) Solms
Water hyacinth may be confused with the native aquatic free-floating frog’s-bit (Limnobium spongia). Frog’s-bit can be distinguished by it’s heart-shaped leaves that grow in a rosette. In addition, water hyacinth has a thick spongy leaf stem, which is absent on frog’s-bit.