. An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian. 2. Arctium Lappa L. Great Bur, Burdock or Clotbur. Fig. 4634. Arctium Lappa L. Sp. PI. 816. 1753. Lappa major Gaertn. Fruct. & Sem. 2 : 379. pi. 162. 1802. Stem much branched, 4°-()° high. Leaves thin, broadlyovate, pale and tomentose-canescent beneath, obtuse,entire, repand or dentate, mostly cordate, the loweroften 18 long; petioles solid, deeply furrowed; headsclustered or
. An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian. 2. Arctium Lappa L. Great Bur, Burdock or Clotbur. Fig. 4634. Arctium Lappa L. Sp. PI. 816. 1753. Lappa major Gaertn. Fruct. & Sem. 2 : 379. pi. 162. 1802. Stem much branched, 4°-()° high. Leaves thin, broadlyovate, pale and tomentose-canescent beneath, obtuse,entire, repand or dentate, mostly cordate, the loweroften 18 long; petioles solid, deeply furrowed; headsclustered or subcorymbose, sometimes long-peduncled,i-\l broad; bracts of the involucre glabrous or nearlyso, their spines all spreading, the inner ones equallingor exceeding the flowers; corolla-tube longer than thelimb. In waste places. New Brunswick and Ontario to southernNew York, and locally in the interior. Not nearly as com-mon as the next species in the Middle States. Naturalizedfrom Europe. Other names are cockle-bur, cockle-button,cuckold-dock, hurr-bur. stick-button, hardock, bardane, beg-gars-buttons. 54^ COMPOSITAE. \0L. III.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
