Andrographis paniculata Burm f Wall. ex Nees (Kalmegh) Family: Acanthaceae
Kalmegh is an erect annual herb with dark green quadrangular stem and longitudinal furrows with wings on the angles. Stem is slightly enlarged at nodes. Leaves are opposite and decussate. White flowers are in axillary or terminal panicles or raceme. Plant grows and also cultivated through out India. Andrographolide is the chief active constituent. The plant is tonic, blood purifier and hepatoprotective.