Ipomoe'A Pandura'Ta (Convolvulus Pandura'Tus), Wild Potato Or Jalap, Man Root, Man Of The Earth. The root, official 1820-1860; United States. Plant recognized by its fiddle-shaped leaves, stem purplish, climbing 3.5-4.5 M. (12-15°) high; flowers campanulate, white, purplish; root conical, .6-1 M. (2-3°) long, 5-7.5 Cm. (2-3') thick, in slices, wrinkled, brownish-yellow, milky inside, bark thin with a zone of resin-cells, odor slight, taste sweetish, bitter, acrid; contains resin 1-2 p. c. (glucoside). Used as diuretic, cathartic in strangury, calculi. Dose, gr. 15-60 (1-4 Gm.). False Jalaps:
Ipomoea Sim'Ulans, Tampico Jalap. Root irregularly globular or elongated deeply wrinkled, no transverse ridges - as in the official; yields resin (tampicin) 10-15 p. c, nearly all being soluble in ether, and believed identical with resin of scammony.
2. I. orizaben'sis, Fusiform (False, Male) Jalap. - Root spindle-shaped, .6 M. (2°) long, strong radiate structure with projecting fibres on transverse fracture, large, woody, often cut into slices 5-7.5 Cm. (2-30 broad, dark brown, broad concentric rings, coarse projecting fibres, and exported liberally for its resin, jalapin, orizabin - false scammony - of which it contains 17 p. c, resembling closely genuine scammony, but entirely soluble in ether, and believed identical with tampicin. It is unfortunate that the resin of this plant received the name jalapin primarily, as it thus precludes in a sense its application to the resin of the official drug. The synonym orizabin, as proposed and named by Fluckiger, may sometime be accepted here, and thus allow the term jalapin to be used where it would seem more properly to belong.
Convolvulus Mechoacan'Na, Mechoacanna Root. Considered by some identical with Ipomoea pandurata; occurs in sections, light, whitish, mealy, contains little resin.