. A manual of weeds : with descriptions of all the most pernicious and troublesome plants in the United States and Canada, their habits of growth and distribution, with methods of control . Weeds. COMPOSITAE {COMPOSITE FAMILY) 473 BEGGAR-TICKS Bidens frondbsa, L. Other English names: Bur Marigold, Stick-tight, Devil's Bootjack, Pitchfork Weed. Native. Annual. Propagates by seed. Time of bloom: July to September. Seed-time: August to October. Range: Throughout United States and southern British America. Habitat: Moist soil; gardens, fields, pastures, roadsides, and waste places. All the Bidens
. A manual of weeds : with descriptions of all the most pernicious and troublesome plants in the United States and Canada, their habits of growth and distribution, with methods of control . Weeds. COMPOSITAE {COMPOSITE FAMILY) 473 BEGGAR-TICKS Bidens frondbsa, L. Other English names: Bur Marigold, Stick-tight, Devil's Bootjack, Pitchfork Weed. Native. Annual. Propagates by seed. Time of bloom: July to September. Seed-time: August to October. Range: Throughout United States and southern British America. Habitat: Moist soil; gardens, fields, pastures, roadsides, and waste places. All the Bidens are most annoying weeds and this one is perhaps the most so because it is everywhere. Stem two to five feet high,' erect, smooth or nearly so, often purplish in color, with spreading branches. Leaves opposite, usually smooth, the lower ones generally five-lobed with terminal segments long-pointed and often again di- vided; upper ones three-parted or sometimes lance-shaped> all sharply toothed; petioles slender, and grooved on the upper side. Heads numerous, about a half-inch long, on slender peduncles; involucre double, with an outer row of five to eight leafy and spreading bracts, spatu- late, with edges hairy at base, much exceeding the heads in length; the inner row short, with scarious mar- gins; rays, when present, yellow, very small and inconspicuous, sterile; disk-florets tubular, orange-yellow,, five-toothed, perfect, and fertile. Achenes wedge-shaped, black, flat, ridged down the center of each face, the apex bearing two di- verging, downwardly barbed awns, which enable them to attach themselves to clothing and to the coats of animals, particularly sheep, and so ensure a wide distribution. (Fig. 329.). Fig. 329. — Beggar-ticks {Bidens frondosa). X Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original wo
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectweeds, bookyear1919
