The drug plants of Illinois drugplantsofilli44teho Year: 1951 IPOMOEA PANDURATA Meyer. Wild potato-vine, man-of-the-earth. Convolvulaceae.—A twining or trailing herbaceous vine; stems stout, 2 to 12 feet long; root very large, fleshy, 2 feet or more long, weighing 15 pounds or more, exuding a milky sap when cut; leaves broadly ovate, pointed, cordate, pinnately veined, petioled, alternate, 2 to 6 inches long; flowers white, 2 to 3 inches long, morning-glory-like; fruit an ovoid, 2- to 4-seeded capsule. The root collected. Infrequent to fre- quent in streamside woods and moist wood- lands thr
The drug plants of Illinois drugplantsofilli44teho Year: 1951 IPOMOEA PANDURATA Meyer. Wild potato-vine, man-of-the-earth. Convolvulaceae.—A twining or trailing herbaceous vine; stems stout, 2 to 12 feet long; root very large, fleshy, 2 feet or more long, weighing 15 pounds or more, exuding a milky sap when cut; leaves broadly ovate, pointed, cordate, pinnately veined, petioled, alternate, 2 to 6 inches long; flowers white, 2 to 3 inches long, morning-glory-like; fruit an ovoid, 2- to 4-seeded capsule. The root collected. Infrequent to fre- quent in streamside woods and moist wood- lands throughout the state. Contains a milky, resinous juice and the glucoside ipomoein. Used as a purgative. IRIS VERSICOLOR L. Blue flag, wild iris, flag lily, poison flag. Irida- ceae.—A leafy, smooth herb 2 to 3 feet tall, perennial; rootstock horizontal, fleshy, thick, branched, ^vith many long, fibrous roots; leaves swordlike, 1/ to 1 inch wide, somewhat glaucous; flowers purplish blue, iris-like, large, handsome, 2 to 6 or more on the stem, rising from the axils of small stem-leaves. The rootstock and roots collected in the fall; the rootstock is pink when broken (those breaking white or yellow have little medicinal value). Frequent, locally some- times very abundant, on the banks of sloughs, ponds, streams, and ditches in all parts of the state. Contains the acrid, resinous substance irisin to the extent of about 25 per cent of the dry drug. Used chiefly as a cathartic and emetic, also as alterative, vermifuge, and diuretic. IRIS GERMANIGA L., I. PALLIDA Lam., I. FLORENTINA L. Iris (cul- tivated). Iridaceae. Rootstocks and roots collected. Culti- vated in gardens throughout the state. Yields orris, which has the odor of violets. Used in tooth powders and sachets.
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