Water Morning Glory

''Ipomoea aquatica'' is a semi-aquatic, tropical plant grown as a vegetable for its tender shoots. This plant is known in English as water spinach, river spinach, water morning glory, water convolvulus, or by the more ambiguous names Chinese spinach, Chinese watercress, Chinese convolvulus or swamp cabbage, or ''kangkong'' in Southeast Asia and ''ong choy'' in Cantonese. Its place of origin is not known.