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.