The drug plants of Illinois drugplantsofilli44teho Year: 1951 Tehon THE DRUG PLANTS OF ILLINOIS 71 LAGTUGA SGARIOLA L. (L. viro- sa L.) Wild lettuce, prickly lettuce, wild opium, compass plant. Cowposi- tae.—An erect, unbranched, bright green herb 2 to 7 feet tall, annual; stem stiff, rigid; leaves deeply, pinnately lobed, ob- long, finely toothed, up to 10 inches long, clasping the stem, alternate but turned to form 2 ranks (pointing north and south), spiny on the midrib beneath; flower heads yellow, small, numerous in a large, open, terminal panicle; seeds black, small, flat- tened, with a
The drug plants of Illinois drugplantsofilli44teho Year: 1951 Tehon THE DRUG PLANTS OF ILLINOIS 71 LAGTUGA SGARIOLA L. (L. viro- sa L.) Wild lettuce, prickly lettuce, wild opium, compass plant. Cowposi- tae.—An erect, unbranched, bright green herb 2 to 7 feet tall, annual; stem stiff, rigid; leaves deeply, pinnately lobed, ob- long, finely toothed, up to 10 inches long, clasping the stem, alternate but turned to form 2 ranks (pointing north and south), spiny on the midrib beneath; flower heads yellow, small, numerous in a large, open, terminal panicle; seeds black, small, flat- tened, with an apical, stalked tuft of floss. The leaves collected in late summer and early fall. Common to abundant as a weed in all neglected waste places through- out the state. Yields a white, milky juice (lactucarium), which contains hyoscyamine. Used as a sedative. LARIX LARIGINA (Du Roi) Koch. Larch, tamarack, American larch, hack- matack. Pinaceae.—A tall, pinelike, de- ciduous tree 25 to 60 feet tall; bark of the trunk separating into bright, reddish- brown, thin scales; foliage in the form of needles; needles slender, triangular, weak, 1/^ to ^ inch long, mostly in crowded bundles from lateral buds, falling in late autumn; fruit a small cone with a few rounded scales. The inner bark and the resinous exudate collected. Limited to the cold bogs in Lake and McHenry counties. Contains tannin, a volatile oil, and a res- in. Used as a laxative, tonic, diuretic, and alterative.
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