It is an annual herb 0.6 to 1.5 m tall. It has an erect, around 2–3 ft long stem, the middle portion is cylindrical, while the upper is quadrangular, with a prominent decurrent line at each angle. Its stem is orange-brown or purplish in color with large continuous yellowish pith.
Leaves are lanceolate, in opposite pairs, no stalks, acuminate, cordate at the base, sessile, five to seven nerved and 4 cm long. Flowers are small, numerous, tetramerous, large leafy panicles, green-yellow, and tinged with purple and green or white hairs. The calyx is gamophyllous with four lobes, corolla-lobes four twisted and superimposed, united at the base where they have pairs of nectaries on each lobe covered with long hairs.Capsules are egg-shaped, 2-valved with a transparent yellowish pericarp. Seeds are numerous, very small and dark brownish in color. The whole plant is widely used by local people for the treatment of hepatitis, inflammation, and digestive diseases.
*above specification are indicative only. actual dimensions may vary by +-10%