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Trollius
''Trollius'' is a genus of about 30 species of plants in the family Ranunculaceae, closely related to ''Ranunculus''. The common name of some species is globeflower or globe flower. Native to the cool temperate regions of the Northern Hemisphere, with the greatest diversity of species in Asia, trollius usually grow in heavy, wet clay soils.
They are mostly herbaceous perennials, produce numerous fibrous roots, with bright yellow flowers, though some have orange to lilac coloured flowers. The name "globe flower" refers to the petals of ''T. europaeus'' and ''T.'' × ''cultorum'' which are curved over the top of the flower, forming a globe. But ''T. pumilus'' has flatter flowers, and ''T. chinensis'' has open flowers with prominent stamens.
All trollius species are poisonous to cattle and other livestock when fresh, but their acrid taste means they are usually left uneaten. They are, however, used as food plants by the larvae of some Lepidoptera species including Silver-ground Carpet.
Some species are popular ornamental flowers in horticulture, with several cultivars selected for large and brightly coloured flowers. The hybrid ''T.'' × ''cultorum''〔(【引用サイトリンク】url=http://www.missouribotanicalgarden.org/gardens-gardening/your-garden/plant-finder/plant-details/kc/b716/trollius-x-cultorum.aspx )〕 in particular is a source of several garden cultivars, including 'Superbus', which has gained the Royal Horticultural Society's Award of Garden Merit.〔(【引用サイトリンク】url=http://apps.rhs.org.uk/plantselector/plant?plantid=1952 )〕
==References==
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「Trollius」の詳細全文を読む
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