. Bulletin. 1901-13. Agriculture; Agriculture. 64 AMERICAN ROOT DRUGS. Arctium lappa L. licRsrar's-huttons. luirr- Siiiioiiiim.—Lappa major Gaertii. Pfiarmacopcrial name.—Lappa. Other romiiioii iiamex.—Cockle-button, cuckold-flock bur, stick-button, bardock. bardaue. (Fig. ) Habitat and range.—Burdock, one of our most coiniiion weeds, was introduced from the Old World. It grows along roadsides, in fields, pastures, and waste plMces. being very Mbnnilant in tlie ICastern and Central States and in some scattered localities in tbe West. Dexeriptinn of /iluiit.—Farmers are only too well ac(|ua
. Bulletin. 1901-13. Agriculture; Agriculture. 64 AMERICAN ROOT DRUGS. Arctium lappa L. licRsrar's-huttons. luirr- Siiiioiiiim.—Lappa major Gaertii. Pfiarmacopcrial name.—Lappa. Other romiiioii iiamex.—Cockle-button, cuckold-flock bur, stick-button, bardock. bardaue. (Fig. ) Habitat and range.—Burdock, one of our most coiniiion weeds, was introduced from the Old World. It grows along roadsides, in fields, pastures, and waste plMces. being very Mbnnilant in tlie ICastern and Central States and in some scattered localities in tbe West. Dexeriptinn of /iluiit.—Farmers are only too well ac(|uainted witli this coarse, unsightly wihhI. l>\iriMg the first year of its growtli this plant, which is a bi- ennial belonging to the aster family (.Vsteraceje). produces only a rosette of large, thin leaves from a long tapering root. In tbe second year a round, Hesby, and branched stem is productnl, tbe plant when full grown nieas- luing from H to 7 feet in height. Tbis stem is brancbecl, grooved, and , bearing Ijirge leaves, tbe lower ones often measuring inches in length. The leaves are placed alternately nn tbe stem, on long, solid, deeply furrowed leafstalks; tliey are thin in texture, suiootli on the \ipper surface, pale and woolly underneath: \i s n a 1 I y b e a r t shaped, hut sometimes roundish or oval, with even, wavy, or tmitbed margins. The tlowers are not produced lU'til tbe second year, appearing from .Tuly until frost. Rnnlock flowers are pur- ple, in small, clustered heads arnjcd with liooked lips, and tbe spiny burs thus formed are a great pest, .ittacbing themselves to clothim: ;ind to the wool and hair of animals. Hurdock is a very prolific seed prodnicr. one plant licaring as many as 4<XMMKI seeds. Itenrriptiiin of root.— Burdock h;is a l:irge. fleshy taproot dig. "-'."i), which, when dry. bei-cmies scaly anil wrinkled lengthwise and has a blacklsb biMwn or grayish brown color on the nutside. bai-d. breaking with a
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