Ipomoea aquatica is a semiaquatic, tropical plant grown as a leaf vegetable. It is found throughout the tropical and subtropical regions of the world, although it is not known where it originated. This plant is known in English as Water spinach, River spinach,Water morning glory, Water convolvulus, or by the more ambiguous names "Chinese spinach", "Swamp cabbage" and "Kangkong" in Southeast Asia. In Bangladesh it is known as "Kalmi Shak." Occasionally, it has also been mistakenly