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''Taraxacum albidum'' is a species of dandelion that grows in eastern Eurasia.〔(Plants for a Future online database: Taraxacum albidum )〕 A member of the Asteraceae, it is a perennial herbaceous plant native to the southern part of Japan. It is sometimes mistaken for ''Taraxacum coreanum'', but ''T. coreanum'' grows wild chiefly in the Korean Peninsula and some parts of China. ''Taraxacum albidum'' is a cross between ''T. coreanum'' and ''Taraxacum japonicum''. (Tatsuyoshi Morita, ''Moleculer phylodenetic analyese of polyoloid complex of East Asian Taraxacum'' (), 1996-1997.)〔http://kaken.nii.ac.jp/ja/p/08640883〕 ==Features== The deeply lobed leaves of this tap-rooted perennial plant form a basal rosette from which the long, slightly downy, unbranched hollow scapes (flower stalks) rise to around 40 cm (1 ft 4in). It blooms once a year, usually in spring (March to May)〔 but sometimes in late autumn. Each scape bears a single flower-head consisting of many small, white ray florets, opening from a rounded bud consisting of narrow green bracts. The flowers are hermaphrodite and self-fertile.〔 It is pentaploid (having five sets of chromosomes), and produces seeds asexually like many other ''Taraxacum'' species. After pollination the flower closes, later opening as the familiar spherical seedhead or "clock", as in other dandelions. The seedhead consists of many single-seeded fruits or achenes, each attached to a pappus of fine hairs that acts as a parachute to enable wind-dispersal of the seeds, sometimes over long distances. The seeds remain dormant till autumn. The leaves wither to avoid heat damage for several months of summer. In autumn, new leaves emerge and continue photosynthesizing until the next summer. 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「Taraxacum albidum」の詳細全文を読む スポンサード リンク
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