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''Canna glauca'' is a species of the ''Canna'' genus, a member of the family Cannaceae. It originates from the wetlands of tropical America and was introduced to England in 1730. The species is native to the southeastern and south-central United States (Texas, Florida, Louisiana and South Carolina) as well as Mexico, Central America, South America and the West Indies. It is also reportedly naturalized in Sri Lanka, Thailand, Vietnam, Java and the Philippines.〔(Kew World Checklist of Selected Plant Families, ''Canna glauca'' )〕 ''Canna glauca''is a perennial growing to 1.5m. It is hardy to zone 10 and is frost tender. In the north latitudes it is in flower from August to October, and the seeds ripen in October. The flowers are hermaphroditic.〔Johnson's Gardner's Dictionary (1856)〕 ==Taxonomy== In the last three decades of the 20th century, ''Canna'' species have been categorised by two different taxonomists, Paulus Johannes Maria Maas from the Netherlands and Nobuyuki Tanaka from Japan. Inevitably, there are differences in their categorisations. Both agree that ''C. glauca'' is a distinct species, but in addition, Tanaka also recognises two varieties:〔Tanaka, N. 2001. Taxonomic revision of the family Cannaceae in the New World and Asia. Makinoa ser. 2, 1:34–43.〕 *''Canna glauca'' var. ''glauca'' It is aquatic species, with narrow, blue-green (glaucous) leaves, atop of which sit its large, delicate, pale yellow flowers. It grows as a marginal plant in up to about 15 cm of still or slow-moving water. *''Canna glauca'' var. ''siamensis'' (Kraenzl) N.Tanaka, 2001 - widespread in South and Southeast Asia, where it is supposed to have differentiated within the past few centuries. 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「Canna glauca」の詳細全文を読む スポンサード リンク
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