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''Pittosporum undulatum'' is a tree growing to 15m tall with wavy (undulating) leaf edges. It is sometimes also known as sweet pittosporum, native daphne, Australian cheesewood, Victorian box or mock orange. It carries conspicuous orange woody fruits about 1 cm in diameter for several months after flowering in spring or early summer.〔http://www.hear.org/Pier/wra/pacific/pittosporum_undulatum_htmlwra.htm〕 Originally ''Pittosporum undulatum'' grew in moist areas on the Australian east coast but has increased its range since European settlement. It is a fast grower, and has become a weed in other parts of Australia where it is not indigenous. It is also highly invasive in South Africa, the Caribbean, Hawaii, the Azores and southern Brazil.〔(【引用サイトリンク】title=''Pittosporum undulatum in southern Brazil'' )〕〔(【引用サイトリンク】title=''Pittosporum undulatum in the Azores, Portugal'' )〕 ''P. undulatums status around the Sydney area is contentious.〔(''Pittosporum undulatum'' - Traitor or Survivor? (pdf file) )〕 Even though it is native to the region, ''P. undulatum'' has spread to soils and bushland where it wasn't found before European settlement, often out-competing other plants. It has done especially well in areas where the environment has been altered by humans - for example by habitat fragmentation weakening other natives, by fertilizer runoff from homes increasing soil nutrients and by the suppression of bushfires near suburbs. Unlike most natives, ''P. undulatum'' takes advantage of high nutrient levels and its seeds can germinate without needing fire. This has led to the species sometimes receiving the "invasive" label although some think that it is merely returning to areas where it grew before people arrived in Australia and began burning the environment far beyond that which previously occurred. ==Images== File:Pittosporum undulatum (Flower).jpg|Detail of flowers. File:Pittosporum.jpg|Pittosporum undulatum. ca 1860 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「Pittosporum undulatum」の詳細全文を読む スポンサード リンク
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