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Lamium
''Lamium'' (deadnettles) is a genus of about 40–50 species of flowering plants in the family Lamiaceae,〔http://pss.uvm.edu/pss123/perlam.html〕 of which it is the type genus. They are all herbaceous plants native to Europe, Asia, and northern Africa, but several have become very successful weeds of crop fields and are now widely naturalised across much of the temperate world.〔(Kew World Checklist of Selected Plant families )〕〔(Altervista Flora Italiana, Genere ''Lamium'' ) includes photos and distribution maps for Europe and North America〕〔(Flora of China Vol. 17 Page 157 野芝麻属 ye zhi ma shu ''Lamium'' Linnaeus, Sp. Pl. 2: 579. 1753. )〕
==Description==
The genus includes both annual and perennial species; they spread by both seeds and stems rooting as they grow along the ground. They have square stems and coarsely textured pairs of leaves, often with striking patterns or variegation. They produce double-lipped flowers in a wide range of colours.〔
The common name "deadnettle" refers to the resemblance of ''Lamium album'' to the very distantly related stinging nettles, but unlike those, they do not have stinging hairs and so are harmless or apparently "dead".
Several closely related genera were formerly included in ''Lamium'' by some botanists, including ''Galeopsis'' (hemp-nettles) and ''Leonurus'' (motherworts).
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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