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Iris × hollandica
''Iris'' × ''hollandica'', commonly known as the Dutch iris, is a hybrid iris developed from species native to Spain and North Africa 〔(Desert-Tropicals )〕 (''Iris tingitana'' × ''Iris xiphium'').〔(NCBI )〕
Two varieties of ''Iris xiphium'' (var. ''praecox'') from Spain and (var. ''lusitanica'') from France, were crossed with ''Iris tingitana'' (from North Africa). This was carried out by a Dutch bulb firm 'Van Tubergen' (based in Haarlem) in the 19th century.〔Rina Kamenetsky and Hiroshi Okubo 〕
Because the bulb could be forced in a greenhouse to flower early, it was popular with florists. Since the 1900s it has been crossed with other species to create various cultivars. After the second world war, stocks of bulbs were imported to America. They then increased the colour range mainly the yellows.〔
==Description==
''Iris'' × ''hollandica'' has a bulb of about and can reach a height of about . This bulbous iris has narrow linear green leaves and bears largish blue to yellow to white flowers.〔(Uniprot: Iris hollandica )〕 They do not have any fragrance. They mainly bloom in May–June.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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