|
''Lactuca virosa'' is a plant in the ''Lactuca'' (lettuce) genus, ingested often for its mild psychotropic (specifically hypnotic or sedative) effects which are often described as being similar to those of opium. It is related to common lettuce (''L. sativa''), and is often called wild lettuce, bitter lettuce, laitue vireuse, opium lettuce, poisonous lettuce, tall lettuce, great lettuce or rakutu-karyumu-so. ''Lactuca virosa'' is widespread across much of central and southern Europe.〔(Altervista Flora Italiana, ''Lactuca virosa'' L. ) includes photos and European distribution map〕 It can be found locally in the south east and east of England. In the rest of Great Britain it is very rare, and in Ireland it is absent. It is also found in the Punjab Region of Pakistan India and Australia where it grows in the wild. In North America, it has been documented as introduced in California, Alabama, Iowa, and Washington, DC, and grows wild in other parts of the continent.〔(Flora of North America, ''Lactuca virosa'' Linnaeus, 1753. )〕 ==Description== ''Lactuca virosa'' is biennial, similar to prickly lettuce ''Lactuca serriola'' but taller - it can grow to 200 cm (80 inches or almost 7 feet). It is also stouter, the stem and leaves are more purple flushed, the leaves are less divided, but more spreading.〔 The achene is purple black, without bristles at the tip. The pappus is the same as ''Lactuca serriola''.〔 In the northern hemisphere, it flowers from July until September. 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「Lactuca virosa」の詳細全文を読む スポンサード リンク
|