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See also:NETTLE (0. Eng. netele, cf. Ger. Nessel) , the See also:English See also:equivalent of See also:Lat . Urtica, a genus of See also:plants which gives its name to the natural See also:order Urticaceae . It contains about See also:thirty See also:species in the temperate parts of both See also:east and See also:west hemispheres . They are herbs covered with stinging hairs; and with unisexual See also:flowers on the same or on different plants . The male flowers consist of a perianth of four greenish segments enclosing as many stamens, which latter, when freed from the See also:restraint exercised upon them by the perianth-segments while still in the bud, suddenly uncoil themselves, and in so doing liberate the See also:pollen . The See also:female perianth is similar, but encloses only a single See also:seed-See also:vessel with a solitary seed . The stinging hairs consist of a bulbous See also:reservoir filled with. acrid fluid, prolonged into a See also:long slender See also:tube, the extremity of which is finely pointed . By this point the See also:hair penetrates the skin and discharges its irritant contents beneath the See also:surface . See also:Nettle tops, or the very See also:young shoots of the nettle, may be used as a See also:vegetable like See also:spinach; but from the abundance of crystals (cystoliths) they contain they are See also:apt to be gritty, though esteemed for their antiscorbutic properties, which they do not possess in any exceptional degree . The fibre furnished by the stems of several species is used for cordage or See also:paper-making . Three species of nettle are See also:wild in the See also:British Isles: Urtica dioica, the See also:common stinging nettle, which is a hairy perennial with staminate and pistillate flowers in distinct plants; U. urens, which is See also:annual and, except for the stinging hairs, glabrous, and has staminate and pistillate flowers in the same panicle; and U. pilulifera (See also:Roman nettle), an annual with the pistillate flowers in rounded heads, which occurs in See also:waste places in the east of See also:England, chiefly near the See also:sea—the more virulent of the British species . From their See also:general presence in the neighbourhood of houses, or in spots where See also:house refuse is deposited, it has been suggested that the nettles are not really natives, a supposition that to some extent receives countenance from the circumstance that the young shoots are very sensitive to See also:frost .
In any See also:case they follow See also:man in his migrations, and by their presence usually indicate a See also:soil See also:rich in See also:nitrogen
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The trailing subterranean See also:root-stock renders the common nettle somewhat difficult of extirpation
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See also:NEPI'LERASH, or URTICARIA, a disorder of the skin characterized by an eruption resembling the effect produced by the sting of a nettle, namely, raised red or red and See also: Chronic cases have been known to benefit from the See also:administration of See also:creosote or salol . |
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