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''Thalictrum'' () is a genus of 120-200 species of herbaceous perennial flowering plants in the Ranunculaceae (buttercup) family native mostly to temperate regions.〔(Flora of North America: ''Thalictrum''. )〕 ''Thalictrum'' is a taxonomically difficult genus with poorly understood species boundaries; it is in need of further taxonomic and field research for clarification. Despite their common name of "meadow-rue", ''Thalictrum'' species are unrelated to the true rue (family Rutaceae), but resemble its members in having the petiole twice or thrice divided.〔(Meadow Rue. ) The ''Century Dictionary''〕 == Description == Meadow-rue leaves are alternate, bipinnately compound, and commonly glaucous blue-green in colour. The flowers are small and apetalous (no petals), but have numerous long stamens, often brightly white, yellow, pink or pale purple, and are produced in conspicuous dense inflorescences. In some species (e.g. ''T. chelidonii, T. tuberosum''), the sepals are large, brightly coloured and petal-like, but in most they are small and fall when the flower opens or soon after. 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「Thalictrum」の詳細全文を読む スポンサード リンク
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