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''Verbena officinalis'', the common vervain or common verbena, is a perennial herb native to Europe. It grows up to a metre/yard high, with an upright habitus. The lobed leaves are toothed, the delicate spikes hold mauve flowers. This plant prefers limey soils; it is occasionally grown as an ornamental plant but perhaps more often for the powerful properties some herbalists ascribe to it. Propagation is by root cuttings or seed. It is widely naturalised outside its native range, for example in North America. ==Common names and taxonomy== It is also known as simpler's joy or holy herb, or more ambiguously as "mosquito plant" or "wild hyssop". The common name "blue vervain" is also sometimes used, but also refers to ''V. hastata''. And of course, being the only member of its genus in much of its range, it is also simply known as "the vervain" locally. The common names of ''V. officinalis'' in many Central and Eastern Europes languages often associate it with iron, for example: * ''Echtes Eisenkraut'' (German: "true ironherb") * ''IJzerhard'' (Dutch: "iron-hard") * ''Læge-Jernurt'' (Danish: "medical ironwort") * ''Železník lekársky'' (Slovak: ("medical ironherb") * ''Rohtorautayrtti'' (Finnish: "medical ironherb") Common vervain was scientifically described by Carl Linnaeus his 1753 ''Species Plantarum''.〔USDA (2007)〕 The scientific name references the Ancient Roman term ''verbena'', used for any sacrificial herb considered very powerful (as described e.g. by Pliny the Elder). ''Officinalis'', meanwhile, is Latin for "used in medicine or herbalism". 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Verbena officinalis」の詳細全文を読む スポンサード リンク
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