. 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. POLYQONACEAE (BUCKWHEAT FAMILY) 103 Introduced. Annual. Propagates by seeds. Time of bloom: June to October. Seed-time: July to November. Range: Throughout the American Continent except the extreme North, and in most parts of the world. Habitat: Soil either dry or moist. Invades nearly all crops. The seeds of this weed form one of the most common impurities of commercial seeds, particularly of red cl
. 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. POLYQONACEAE (BUCKWHEAT FAMILY) 103 Introduced. Annual. Propagates by seeds. Time of bloom: June to October. Seed-time: July to November. Range: Throughout the American Continent except the extreme North, and in most parts of the world. Habitat: Soil either dry or moist. Invades nearly all crops. The seeds of this weed form one of the most common impurities of commercial seeds, particularly of red clover. In a bulletin issued by the Agricultural Experiment Station of Nevada, concerning "Clover Seeds and their Impurities," it is stated that of red clover samples sub- mitted for inspection (obtained in all parts of the country), per cent con- tained seeds of Persicaria. (Fig. 61.) Stems six inches to two feet tall, often red or purplish at base, nearly smooth, erect or sometimes spreading. Leaves lance-shaped, smooth or with fine hair roughening the edges, pointed at both ends and generally blotched near the center with a large brownish spot. It is related that Joseph once hurt his hand while working in his car- penter's shop. Mary wished to make a healing poultice with this plant, but " She could not find it at her need And so she pinched it for a weed,". Fig. 61. —Lady's Thumb (Polygonum Persicaria). X \. since when its leaves have always borne the mark of the Lady's thumb; the sheathing stipules at their base are fringed with short bristles. Flower- spikes numerous, dense, erect, a half-inch to two inches long; calyx pink or purplish with four or five obtuse lobes, usually six stamens, and a two- or three-parted style. Achenes lens- shaped or sometimes three-angled, smooth, shining, jet-black. In some localities the plant is said to harbor the corn-root aphis, the louse appearing with the first Please note that these images are extracte
Size: 1036px × 2411px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectweeds, bookyear1919
