Acorus calamus Linn. is an herbaceous perennial with a rhizome that is long indefinite branched, smooth, pinkish or pale green. Its leaf scars are brown white and spongy and it possess slight slender roots. The leaves are few and distichously alternate whose size was found to be between 0.7 and 1.7 cm wide with average of 1 cm. The sympoidal leaf of Acorus calamus is shorter than that of the vegetative leaves. The flowers are 3 to 8 cm long, cylindrical, greenish brown and contains multitude of rounded spikes covering it. The fruits are found to be small and berry like with few seeds.