This plant is sold in pet stores for use in home fish aquaria.
Green chloroplasts appear mottled because of their internal grana.
In this specimen you can see a nucleus and nucleolus, something not often seen in such cells. The nucleus of this very flat cell is easily seen. The cells have been stained with to make then easier to see. Each cell has a nucleus. The specimen has been stained with gram iodine to give the nuclei more contrast.