A common plant in gardens, but native of the warmer climates. It is two feet high. The stalks are round, slender, of a dark colour, and jointed; the leaves are large and longish, and of a deep green; they stand two at each joint, The flowers are small and white, and each is succeeded by two pods growing together; the root is fibrous and spreading.
The root is used; an infusion of it fresh is good against the jaundice; it works by urine and opens obstructions. Dried and given in powder, it operates by sweat, and is good in fevers.