Siriyanangai : Siriyanangai ( Kariyat ) is a herbaceous plant in the family Acanthaceae native to India and Sri Lanka. It is an erect annual herb extremely bitter in taste in each and every part of the plant body . It grows erect to a height of 30-110 cm in moist shady places with glabrous leaves and white flowers having rose-purple spots on the petals. Flowers are small solitary in panicles. Fruit is approximately 2 cm long. Seeds are numerous yellow-brown in colour. The flowers of Siriyanangai looks like a snake cobra. This medicinal plant is used for snake bites in some villages.