Convolvulus. Convolvulus panduratus L. (Now Ipomoea fastigiata, Sweet. Wild Potato. Man-root. Man of the Earth. Wild Jalap.—This native climber has a perennial root, which is very large, two or three feet in length, about three inches thick, branched at the basal portion, externally of a brownish-yellow color, and with numerous longitudinal fissures, internally whitish and milky, and of a somewhat acrid taste. It is feebly cathartic and diuretic (N. Y. Journ. of Med., x, 375), and was formerly used in strangury and calculous diseases. Forty grains (2.6 Gm.) of the dried root are said to purge gently.