The drug plants of Illinois drugplantsofilli44teho Year: 1951 24 ILLINOIS NATURAL HISTORY SURVEY Circular 44 ARCTIUM MINUS Bernh. Burdock, smaller burdock, clotbur, cuckoo but- ton. C ompositae.—A large-leaved, coarse, hairy herb up to 5 feet tall, bien- nial; taproot long, up to 3 inches in diam- eter; stem the second year erect, stout, ridged; leaves up to 12 inches long, cor- date, pale hairy beneath, with ruffled en- tire to dentate margins, in rosettes from the crown the first year, alternate on the stem the second year; petioles hollow; flower heads pink to purple, globular, com- pa
The drug plants of Illinois drugplantsofilli44teho Year: 1951 24 ILLINOIS NATURAL HISTORY SURVEY Circular 44 ARCTIUM MINUS Bernh. Burdock, smaller burdock, clotbur, cuckoo but- ton. C ompositae.—A large-leaved, coarse, hairy herb up to 5 feet tall, bien- nial; taproot long, up to 3 inches in diam- eter; stem the second year erect, stout, ridged; leaves up to 12 inches long, cor- date, pale hairy beneath, with ruffled en- tire to dentate margins, in rosettes from the crown the first year, alternate on the stem the second year; petioles hollow; flower heads pink to purple, globular, com- pact, burlike, clustered in the kaf axils, armed with inwardly hooked spines. The root collected in the fall of the plant's first year, seeds the second year. State-wnde in distribution; occasional to abundant as a weed in farmyards, pas- tures, abandoned fields, and open land. Source of the drug lappa; contains inulin and the glucoside lappin. Used as a diuret- ic and alterative. \_Arctium Lappa L., the great burdock, is the European plant from which the drug lappa is obtained. It has been introduced into Illinois but is not nearly so common as the species above. It can be recognized by the solid petioles of its leaves,]
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