. 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. CARYOPHYLLACEAE (PINK FAMILY) 137 pedicels droop as soon as the seed begins to form. Pod or capsule with five valves, which are opposite the sepals. Seeds many, dull black, small, round, flat, sharply margined, rough- ened with very minute pimples; they are a frequent impurity of grass and clover seed; also they possess long vitality when lying dormant in dry soil. (Fig. 88.) Means of control Prevent
. 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. CARYOPHYLLACEAE (PINK FAMILY) 137 pedicels droop as soon as the seed begins to form. Pod or capsule with five valves, which are opposite the sepals. Seeds many, dull black, small, round, flat, sharply margined, rough- ened with very minute pimples; they are a frequent impurity of grass and clover seed; also they possess long vitality when lying dormant in dry soil. (Fig. 88.) Means of control Prevent seed development. In some cases ground infested with Spurry may profitably be grazed off by sheep while the plants are young. Among crops in which hoe-cutting is impracticable, a five- per-cent solution of Copper sulfate, applied when the plants are about half-grown or even when they are in first bloom, will prevent the formation of seed. Land fouled with seeds of Spurry should be put to a well-tilled hoed crop before being seeded with grain or clover. THYME-LEAVED SANDWORT Arenaria serpyllifdlia, L. Introduced. Annual. Propagates by seeds. Time of bloom: May to August. Seed-time: June to September. Range: Throughout North America except the far North. Habitat: Dry soil; waste places. A very slender, much-branched, and spread- ing little plant. Not an aggressive weed but merely doing its best to cover dry and sterile soil, that is unsuited to plants of more worth. Stems two to eight inches high, light green, and rough-hairy. Leaves op- posite, sessile, ovate, acute, hardly more than a quarter-inch long. Flowers many, very small, white, in leafy, cymose panicles; sepals five, lance-shaped, pointed, bristly on the back, about as long as 'the petals, which are also five, oblong or obovate. Stamens ten, with lilac anthers. Styles three. The. Fig. 89. —Thyme- leaved Sandwort (Arenaria serpylli- folia). X \.. Please note that these images are extracted from scanned page images tha
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectweeds, bookyear1919
