. The Indiana weed book. Weeds. Occurs in the same places as the curled dock, but less common. June—Aug. The seeds of both these docks are often found in clover and alfalfa seed which has not been properly cleaned. Where found in cultivated land, both can be eradi- cated only by short rotation or thor- ough cultivation with hoed crops. 19. Polygonum pennsylvanicum L. Pennsylvania Sniartweed. Gland- ular Perslcary. (A. N. 2.) Erect, simple or branched, 2-6 feet high, the flower stems with numerous glands; leaves lanceolate, pointed, 2-11 inches long. Spikes several, short, erect, cylindrical, d
. The Indiana weed book. Weeds. Occurs in the same places as the curled dock, but less common. June—Aug. The seeds of both these docks are often found in clover and alfalfa seed which has not been properly cleaned. Where found in cultivated land, both can be eradi- cated only by short rotation or thor- ough cultivation with hoed crops. 19. Polygonum pennsylvanicum L. Pennsylvania Sniartweed. Gland- ular Perslcary. (A. N. 2.) Erect, simple or branched, 2-6 feet high, the flower stems with numerous glands; leaves lanceolate, pointed, 2-11 inches long. Spikes several, short, erect, cylindrical, dense flowered; calyx dark pink or rose color, 5-parted. Seeds lens- ., shaped, i inch long, dark, shining. (Pig. 32.) Common in moist soil, especially that near the margins of lakes, ponds and marshes. July-Oct. Stems stouter than our other forms and when old very hard and woody. Seeds frequent in those of clover cut from lowlands. The leaves are often spot- ted with a reddish leaf- spot fungus and the heads are sometimes affected with a smut which destroys the seeds. Remedies: mowing before the seeds have rip- ened; hoeing, pulling and cultivating. 20. Polygonum persicaeia L. Lady's Thumb. Spot- ted Smartweed. Heart- weed. (A. I. 2.) Stem erect or ascendirg, simple or much branched, glabrous, 6 inches to 2 feet high; leaves lanceolate, pointed at both ends, often with a tri-. Fig. 32. Showing the flower opened and spread apart and the fruit with its two styles. (After Small.) [SI. 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 Blatchley, W. S. (Willis Stanley), 1859-1940. Indianapolis, The Nature publishing company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectweeds, bookyear1912
