. Common weeds of Canada [microform] : a pocket guide. Weeds; Mauvaises herbes, Lutte contre les; Weeds; Mauvaises herbes. \(>.\I()LS WEEDS L\ U ESTEI'X CAXADA 127 lohed or without loins. Flowers. Sterile and fertile flowers in different heads on the same jilant; the sterile in long, slender spikes at ihe ends of branches; the fertile, two or tliree together, and sessile in the axils of the leaves ;it the liase of the s])ikes: sterile How rs cup-shaped, nodding, '4 inch across, with yellow, cons])icuous anthers: fertile llowers inconspicuous, with pur- l)lish slender ])istils. Fruit.—Acheii
. Common weeds of Canada [microform] : a pocket guide. Weeds; Mauvaises herbes, Lutte contre les; Weeds; Mauvaises herbes. \(>.\I()LS WEEDS L\ U ESTEI'X CAXADA 127 lohed or without loins. Flowers. Sterile and fertile flowers in different heads on the same jilant; the sterile in long, slender spikes at ihe ends of branches; the fertile, two or tliree together, and sessile in the axils of the leaves ;it the liase of the s])ikes: sterile How rs cup-shaped, nodding, '4 inch across, with yellow, cons])icuous anthers: fertile llowers inconspicuous, with pur- l)lish slender ])istils. Fruit.—Acheiies. Seeds.—Brown, urn- shaped acheiies, about '4 inch long, ti])i)e(l with a ta])ering l)eak and bearing around the base of this, about f)nc-third from the top, like tlie jioints of a crown, (> or N blunt spines— lience the name, Crownwced, sometimes given the plant. Duration.— .\nnual. Flowering.—July. Seeding. - August. Propagation.— 15y seeds. Dis- persal—Seeds carried by water and in grain. Eradication.—Hand-])ull, or mow Ijefore seeds are ripe. Great Ragweed, Kiiigwced, Crown weed. Tall Rag\\\e(l, or Bitterweed, is a tall, coarsi, native annual only occasionally found in the easttrn pro\incc s, but alnind- ant in the rich Red River valley lands in Manitoba and westward along the railways. When in croj) it crowds and starves grain growing near it. The plants arc coarse and conspicuous, and easily eradi cated by hand pulling. .Millers experience dilTieulty in separathig the seed of great ragweed from grain seeds in cleaning wheat, be cause of its similarity in size and weight to wheat, and because the sj^ines catch in the meshes of the screens in the cleatiiiig process. The False Ragweed, Iru xanthiijolia, (Xutt), a coarse annual closely resembling Great Ragweed, is a common plant by roadsides, along railwavs and in corrals in Manitoba. It bears at the top of the stem a large, lf)ose panicle of dark-colored flowers, while the Great Ragweed has manv of the
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectweeds, bookyear1910
