. 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. 450 COMPOSITAB (COMPOSITE FAMILY) while on each side of it springs a stalk, taller than itself, bear- ing a leaf-cup, which in turn will have a central head and two more cup-bearing stalks; these will fork again, and yet again, the series being some- times "four stories high," as an observant child remarked. Each head resembles a small sunflower, two or three inches broad, with twenty to th
. 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. 450 COMPOSITAB (COMPOSITE FAMILY) while on each side of it springs a stalk, taller than itself, bear- ing a leaf-cup, which in turn will have a central head and two more cup-bearing stalks; these will fork again, and yet again, the series being some- times "four stories high," as an observant child remarked. Each head resembles a small sunflower, two or three inches broad, with twenty to thirty narrow, yellow rays, pistillate and fertile; the ' disk-florets are sterile; involucral bracts in triple rows, broadly ovate, and conspicuous. Achenes en- circle the outer edge of the head, as only the rays form fruit; they are oval, broad, brown, flat, notched at apex, winged on each side, with a pappus olF two awn-like teeth. The same methods of exter- mination should be used as for the Compass Plant. (Fig. 313.). Fig. 313. — Cup Plant (Silphium per- foliatum). X |. ROUGH MARSH ELDER Iva ciliata, Willd. Native. Annual. Propagates by seed. Time of bloom: August to October. Seed-time: September to November. Range: Illinois to Nebraska; and southward to Louisiana, Texas, and New Mexico. Habitat: Meadows and fields, sides of streams, and waste places. A coarse, unsightly weed, bristly with rough hairs, two to seven feet in height, the erect stem usually simple but sometimes branched and often mottled with different shades of green. Leaves opposite,. 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 Georgia, Ada Eljiva, 1859-1921. New York : Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectweeds, bookyear1919
