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''Cladrastis'' (yellowwood) is a genus of seven species of flowering plants in the family Fabaceae, six native to eastern Asia, and one to southeastern North America. Species of ''Cladrastis'' are small to medium-sized deciduous trees typically growing 10–20 m tall, exceptionally to 27 m tall. The leaves are compound pinnate, with 5–17 alternately arranged leaflets. The flowers are fragrant, white or pink, produced in racemes or panicles 15–40 cm long. The fruit is a pod 3–8 cm long, containing one to six seeds. ''Cladrastis'' is related to the genus ''Maackia'', from which it differs in having the buds concealed in the leaf base, and in the leaflets being arranged alternately on the leaf rachis, not in opposite pairs. The genus name derives from the Greek ''klados'', branch, and ''thraustos'', fragile, referring to the brittle nature of the twigs. The combination of ''Cladrastis'', ''Pickeringia'' and ''Styphnolobium'' form a monophyletic clade known as the ''Cladrastis'' clade; as the other two originated from within ''Cladrastis'', ''Cladrastis'' is paraphyletic. ==Species== ''Cladrastis'' comprises the following species: * ''Cladrastis chingii'' Duley & Vincent * ''Cladrastis delavayi'' (Franch.) Prain〔Some sources treat ''Cladrastis delavayi'' as a synonym of ''Cladrastis sinensis''.〕 * ''Cladrastis kentukea'' (Dum. Cours.) Rudd—Southeastern North America. * ''Cladrastis parvifolia'' C.Y. Ma—Guanxi, China. * ''Cladrastis platycarpa'' (Maxim.) Makino—Japan. * ''Cladrastis scandens'' C.Y. Ma—Guizhou, China. * ''Cladrastis shikokiana'' (Makino) Makino—Southern Japan. * ''Cladrastis sinensis'' Hemsl.—China, widespread. * ''Cladrastis wilsonii'' Takeda—Central China. 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「Cladrastis」の詳細全文を読む スポンサード リンク
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