. 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. COMPOSITAE (COMPOSITE FAMILY) 487 Cattle usually avoid the plant when green, but sometimes eat it with dry fodder, and then it is very damaging to the quality of dairy products. Flowers in dense, flat-topped, stiffly branched, compound corymbs, the heads very small, white or sometimes pink; rays and disk-florets both fertile; bracts of the invo- lucre, imbricated, with scarious margins. Achenes flatt
. 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. COMPOSITAE (COMPOSITE FAMILY) 487 Cattle usually avoid the plant when green, but sometimes eat it with dry fodder, and then it is very damaging to the quality of dairy products. Flowers in dense, flat-topped, stiffly branched, compound corymbs, the heads very small, white or sometimes pink; rays and disk-florets both fertile; bracts of the invo- lucre, imbricated, with scarious margins. Achenes flattened oblong, without pappus. (Fig. 338.) Means of control The rootstocks are horizontal and tough, and cling rather strongly to the parent plant, so that sometimes when the ground is soft one may oust a whole colony at a pull — the young shoots of the first year being mere tufts of plume-like leaves. Prevent seed production by close cutting before the first flowers mature. In cultivated crops the weed is suppressed by the required tillage. SKEEZEWORT YARROW Achillea Ptdrmica, L. Other English names: White Sneezeweed, White Tansy, Wild Pellitory. Introduced. Perennial. Propagates by seeds and by rootstocks. Time of bloom: July to September. Seed-time: August to October. Range: Newfoundland and New Brunswick to Michigan, southward to Massachusetts. Habitat: Moist soil; low meadows, and waste places. The range of this weed has increased of recent years, chiefly by the agency of baled .hay. Stem slender, one to two feet tall, rather rigid, smooth or only slightly hairy, sometimes branched at the top but usually simple. Leaves alternate, one to three inches long, narrow lance-shaped to linear, pointed, sharply and very finely toothed, sessile and partly clasping, often hairy on the veins. Fig. 339. — Siieeze- wort Yarrow (Achillea Ptarmica). x \.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colorati
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectweeds, bookyear1919
