Alternanthera sessilis

Alternanthera sessilis is an aquatic plant known by several common names, including ponnanganni (in Tamil), ponnaganti aaku (in Telugu),Honnagone in Kannada Mukunuwenna (in Sinhala), sessile joyweed and dwarf copperleaf. It is used as a vegetable specially in Sri Lanka and some Asian countries. The plant occurs throughout the tropical and subtropical regions of the Old World. It has been introduced to the southern United States, and its origins in Central and South America are uncertain.