. 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. OARYOPHYLLACEAE {PINK FAMILY) 151 the chemicals have leached away. Constant cutting of the green tops will finally starve the rootstocks, if continued without cessa- tion for two seasons. COW COCKLE Saponaria Vaccaria, L. Other English names: Cow-herb, Spring Cookie, Pink Cockle, China Cookie. Introduced. Annual. Propagates by seeds. Time of bloom: June to July. Seed-time: July to August. Range: Onta
. 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. OARYOPHYLLACEAE {PINK FAMILY) 151 the chemicals have leached away. Constant cutting of the green tops will finally starve the rootstocks, if continued without cessa- tion for two seasons. COW COCKLE Saponaria Vaccaria, L. Other English names: Cow-herb, Spring Cookie, Pink Cockle, China Cookie. Introduced. Annual. Propagates by seeds. Time of bloom: June to July. Seed-time: July to August. Range: Ontario to British Columbia, southward to the Gulf of Mexico. Locally very abundant, especially in the wheat-growing parts of the West. Habitat: Grain and alfalfa fields, waste places. An immigrant from Europe, where it is said to have been formerly used as a forage plant, the specific name, Vaccaria, having been given in allusion to its value as cow fodder. But it is listed among the "Stock- Poisoning Plants of Montana," in the bulletin of that name published by the United States Department of Agricul- ture, and its seeds, like those of Corn Cockle, contain a poisonous property that makes flour unwholesome and dan- gerous to use when by accident they are ground with wheat. Grain contami- nated with these seeds is sharply "-cut" in the market. (Fig. 102.) Stem one to three feet tall, erect, slender, smooth, glaucous, round, and swollen at the joints, many-branched. Leaves long ovate, pointed, smooth and glaucous, opposite and clasping the stem, the pairs sometimes united at base. Flowers in loose corymbose clus- ters, on rather long, wiry pedicels; calyx a swelling, five-ribbed vase in two shades of green, the ribs darker and so promi-. Fig. 102. — Cow Cockle (Saponaria Vaccaria). X !•. 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
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectweeds, bookyear1919
