From the Botanical Angle
The plant is a perennial plant. The ideal growing conditions are low rich, moist, soil in swamps and near running streams. May and June see a panicle of small yellowish green flowers and one or two seeds about the size of a large pea in the plant, which ripens in August.
The root is hard thick, irregular, knotty, and contorted. The length can be 1 to several inches long. The colour index is externally yellowy brown, internally whitish to yellow. From the perspective of taste it is sweetish-bitter, then acid and pungent. The odour is slightly (pungent) fragrant.