. 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 102d meridian. Botany; Botany. 1, Cirsium lanceolatum (L.) Hill. Common Bur or Spear Thistle. Fig. 4636. Carduus lanceolatus L. Sp. PI. 821. 1753. Cirsium lanceolatum Hill, Herb. Brit. 1: 80. 1769. Cnicus lanceolatus Willd. Prodr. Fl. Berol. 259. 1787. Biennial; stem stout, branched, more or less to- mentose, 3°-5° high, leafy to the heads. Leaves dark green, lanceolate, acuminate, deeply pi
. 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 102d meridian. Botany; Botany. 1, Cirsium lanceolatum (L.) Hill. Common Bur or Spear Thistle. Fig. 4636. Carduus lanceolatus L. Sp. PI. 821. 1753. Cirsium lanceolatum Hill, Herb. Brit. 1: 80. 1769. Cnicus lanceolatus Willd. Prodr. Fl. Berol. 259. 1787. Biennial; stem stout, branched, more or less to- mentose, 3°-5° high, leafy to the heads. Leaves dark green, lanceolate, acuminate, deeply pinnatifid, 3'-6' long, or the lowest larger, decurrent on the stem and branches, the lobes triangular-lanceolate, tipped with stout prickles, the margins and decurrent bases bristly, the upper surface strigose-pubescent or his- pid, the lower brown-tomentose and midnerve pilose, especially when young; heads mostly solitary at the ends of the branches, iJ'-2' broad, 1Y-2' high; bracts of the involucre cottony, narrowly lanceolate, acumi- nate, all tipped with slender, erect or ascending prickles; flowers dark purple. In fields and waste places, Newfoundland to Georgia, Minnesota, Nebraska, Oregon and California. Natural- ized from Europe. Native also of Asia. Plume-, bank- or horse-thistle, bell-, bird-, blue-, button-, boar-, bull- or roadside-thistle. July-Nov. 2. Cirsium altissimum (L.) Spreng. Tall or Roadside Thistle. Fig. 4637. \ Carduuse altissimus L. Sp. PI. 824. 1753. Cnicus altissimus Willd. Sp. PI. 3: 1671. 1804. Cirsium altissimum Spreng. Syst. 3: 373. 1826. Biennial or perennial; roots often thickened; stem pubescent or tomentose, stout, branched, leafy to the heads, 3°-io° high. Leaves ovate-oblong or oblong-lanceolate, sessile or slightly clasping, spar- ingly pubescent above, densely white-tomentose be- neath, scarcely or not at all decurrent, acute, spinu- lose-margined, entire, dentate with bristle-pointed teeth or Iobed, sometimes pinnatifid into oblon
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
