. 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) 471 broad, with twelve to fifteen pistillate and fertile bright golden rays, three-toothed at tips; disk florets perfect and fertile, brown- ish yellow; involucre about one-half inch high with lance-shaped, spreading, hairy bracts. Achenes of the disk florets narrowly obovate, flattened, hairy, broadly winged, with a pappus of two needle-like awns; those of the rays thic
. 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) 471 broad, with twelve to fifteen pistillate and fertile bright golden rays, three-toothed at tips; disk florets perfect and fertile, brown- ish yellow; involucre about one-half inch high with lance-shaped, spreading, hairy bracts. Achenes of the disk florets narrowly obovate, flattened, hairy, broadly winged, with a pappus of two needle-like awns; those of the rays thickened, rough- wrinkled and usually without awns or wings. (Fig. 327.) Means of control Prevent seed production. In grain fields the weed seedlings may be harrowed out in spring when the crop is but a few inches above the ground. Plants which survive this treatment may profitably be hand-pulled, the increased returns paying for the labor. Grasslands should be harvested before .the first flowers mature, and all waste places receive attention. LANCE-LEAVED TICKSEED Cored psis lanceolata, L. Native. Perennial. Propagates by seeds. Time of bloom: May to August. Seed-time: June to September. Range: Western Ontario to Virginia and Florida. Locally in the Eastern States. Habitat: Meadows, fence rows, roadsides, and thickets. A plant often cultivated because of the showy beauty of its flowers, and freely escaping. Stem one-to two feet in height, branching from the lower part, smooth, or slightly downy near the base. Leaves op- posite, two to six inches long, lance-shaped or the lowest spatulate, tapering to petioles which partly clasp the stem; upper ones FiG sessile, all entire, with rough edges. Heads leaved Tickseed (Coreopsis solitary, about two inches broad, on slen- lanceolata). 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 perfec
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectweeds, bookyear1919
