. 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. POLYGONACEAE {BUCKWHEAT FAMILY) 101 fungus which turns the heads into a mass of purple spores, de- stroying the fruits so that "purplehead" is a benefit from the farmer's point of view. Achenes black, lens-shaped, smooth, and shining. (Fig. 59.) Means of control Cut closely or pull before any seeds have matured. Rankly infested ground should be put under cultivation before being again used
. 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. POLYGONACEAE {BUCKWHEAT FAMILY) 101 fungus which turns the heads into a mass of purple spores, de- stroying the fruits so that "purplehead" is a benefit from the farmer's point of view. Achenes black, lens-shaped, smooth, and shining. (Fig. 59.) Means of control Cut closely or pull before any seeds have matured. Rankly infested ground should be put under cultivation before being again used for clover or grass. Good drainage is an assistance in subdu- ing this weed, for it likes the soil to be moist. COMMON SMARTWEED Polygonum Hydrdpiper, L. Other English names: Water-pepper, Biting Knotweed. Native. Annual. Propagates by seeds. Time of bloom: June to September. Seed-time: July to November. Range: Throughout North America. Naturalized in the Eastern States, but indigenous in the Northwest. Habitat: Low fields and meadows; gar- dens and barnyards, waste places. The juice of this plant is exceedingly biting and pungent to the taste and will raise blisters when applied to the skin. It is not insistently a water- weed, as its name implies, but will grow where the soil is only moderately moist. Stem smooth, erect, slender, with few branches, ten inches to two feet tall, light green or frequently of a reddish color. Leaves narrow lance-shaped, one to four inches long, with short petioles, the surface dotted with glands, the edges entire or slightly wavy, ciliate, the sheathing stipules cylindric and fringed with short bristles. Flowers in slender,. Fig. 60. — Common Smart- weed (Polygonum Hydropiper).. 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 : Macmil
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectweeds, bookyear1919
