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Echium plantagineum : ウィキペディア英語版 | Echium plantagineum
''Echium plantagineum'', commonly known as purple viper's-bugloss or Paterson's curse, is a species of ''Echium'' native to western and southern Europe (from southern England south to Iberia and east to the Crimea), northern Africa, and southwestern Asia (east to Georgia).〔(''Echium plantagineum''. ) ''Flora Europaea''.〕〔(''Echium plantagineum''. ) Germplasm Resources Information Network.〕 It has also been introduced to Australia, South Africa and United States, where it is an invasive weed. Due to a high concentration of pyrrolizidine alkaloids, it is poisonous to grazing livestock, especially those with simple digestive systems, like horses. The toxins are cumulative in the liver, and death results from too much Paterson's curse in the diet. ==Description== ''Echium plantagineum'' is a winter annual plant growing to 20–60 cm tall, with rough, hairy, lanceolate leaves up to 14 cm long. The flowers are purple, 15–20 mm long, with all the stamens protruding, and borne on a branched spike.〔Blamey, M. & C. Grey-Wilson. ''Flora of Britain and Northern Europe''. 1989. ISBN 0-340-40170-2〕〔Piggin, C. M. & A. W. Sheppard. (1995). ''Echium plantagineum'' L. In: Groves, R. H., R. C. H. Shepherd, and R. G. Richardson, (eds.) ''The Biology of Australian Weeds'' Vol 1. R. G. and F. J. Richardson, Melbourne. pp 87-110.〕
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