Hemp, an annual herb (Cannabis sativa) having angular rough stems and alternate deeply lobed leaves. The bast fibres of Cannabis are the hemp of commerce, but, unfortunately, the products from many totally different plants are often included under the general name of hemp.
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We all know hemp as a roadside weed, tall, straight, with whorls of spreading, lady-finger leaves, all pitched at a downward slant, the flowers clustered at the bases of the leaves, as happens with all members of the stinging nettle family, to which hemp belongs.
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Fiber Investigations — Hemp & Flax. Many plant fibers and many questions pertaining to fiber production have been investigated during the past year, but attention has been directed especially to hemp and flax, which, aside from cotton, are regarded as the most promising fiber-producing plants for this country.
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The hemp plant (Cannabis sativa) is an annual, belonging to the nettle family. It grows to a height of from 5 to 15 feet, and when cultivated for fiber (Pl. LXXIX, fig. 1) produces only a few small branches near the top of the slender stalk. Its leaves, of a rich dark-green color, are composed of 5 to 9 lanceolate, serrate, pointed leaflets, 2 to 5 inches in length and about one-sixth as wide.
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Hemp, a tough fibre yielded by the large annual plant Cannabis sativa, of the natural order Cannabinaceae. There are, however, several other fibres known in commerce to which the term is more or less commonly applied.
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