. 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. 284 BYPESICACEAE (ST. JOHlfS-WORT FAMILY) The whole plant is softly hairy. Flowers two inches or more broad, cream-yellow, with a purplish brown spot at the base of each of the five petals. Fully ripened pods are two to four inches long, nearly three-quarters of an inch thick at base, tapering to a point, and ten-ribbed. The ribs soon become strongly fibrous, and when the fruit is wanted for food, 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. 284 BYPESICACEAE (ST. JOHlfS-WORT FAMILY) The whole plant is softly hairy. Flowers two inches or more broad, cream-yellow, with a purplish brown spot at the base of each of the five petals. Fully ripened pods are two to four inches long, nearly three-quarters of an inch thick at base, tapering to a point, and ten-ribbed. The ribs soon become strongly fibrous, and when the fruit is wanted for food, the pods must be picked when about two days old. Seeds dark brown, nearly globular, with a white eye on one side; they retain their vitality for about five years. Means of control Small patches may be hand-pulled or grubbed out. More extensive areas require to be put under cultivation, in order to destroy the perennial roots, and stir dormant seeds into Fig. 199. — Common St. John's-wort (Hyperi- cum perforatum). X h COMMON ST. JOHN'S-WORT Hypericum perforatum, L. Other English names: Herb of St. John, Speckled John. Introduced. Perennial. Propagates by seeds and by runners from the base of the stem. Time of bloom: June to September. Seed-time: July to October. Range: Throughout British America except in the far North, and in all the states except the most southern. Habitat: Fields, pastures, and waste places. A most pernicious weed, difficult of sup- pression. When young its juices are so acrid and blistering that no grazing animal will eat the plant; and when mature or dried in hay, stock reject it because of its woody toughness. (Fig. 199.) Stem ten to thirty inches tall, erect, slender, much branched, rather stiff, bear- ing along the sides two opposing ridges which make it two-edged. Leaves op- posite, oblong to elliptic, one-half inch to. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readabilit
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectweeds, bookyear1919
