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''Euphorbia'' subg. ''Poinsettia'' is a subgenus deriving from the genus ''Euphorbia'', and is endemic to North America. This species grows wild in the mountains on the Pacific slope of Mexico, and despite many legends, no one is quite sure from which wild populations the cultivated varieties derive.〔http://www.explorelifeonearth.org/poinsettia.html〕 This taxon was first published at genus rank under the name ''Poinsettia'' by Robert Graham in 1836.〔R. Graham. Description of several new or rare plants... Edinburgh New Philosophical Journal 20(2): 412–413. 1836〕〔Hibbert & Buist. 1839 edition. American Flower Garden Directory. p. 191〕 It was demoted to a section of ''Euphorbia'' as ''E.'' sect. ''Poinsettia'' by Henri Ernest Baillon in 1858, but promoted to subgenus rank by Homer Doliver House in 1924. Recent studies have confirmed its monophyly. Its many species include: * ''E. pulcherrima'' -- (Poinsettia) * ''E. cyathophora'' -- (Summer Poinsettia, Wild Poinsettia, Painted Leaf Poinsettia) * ''E. dentata'' -- (Green Poinsettia) * ''E. heterophylla'' -- (Desert Poinsettia, Wild Poinsettia) * ''E. pinetorum'' -- (Everglades Poinsettia) The common name "Wild Poinsettia" is sometimes applied to two of these species. ==History & Legends of the Poinsettia== The Aztecs called poinsettias "Cuetlaxochitl." During the 14th - 16th century the sap was used to control fevers and the bracts (modified leaves) were used to make a reddish dye. Montezuma, the last of the Aztec kings, would have poinsettias brought into what now is Mexico City by caravans because poinsettias could not be grown in the high altitude. In the 17th century, Juan Balme, a botanist, noted the poinsettia plant in his writings. The botanical name, Euphorbia pulcherrima, originated as an annotation of a herbarium specimen by the German botanist, Carl Ludwig Willdenow and was first published by Johann Friedrich Klotzsch in 1834.〔zweier neuen Euphorbien aus Mexico. Allgemeine Gartenzeitung 2(4): 27–28. 1834 ()〕 Joel Roberts Poinsett was the first United States Ambassador to Mexico being appointed by President John Quincy Adams in the 1820s. At the time of his appointment, Mexico was involved in a civil war. Because of his interest in botany he introduced the American elm into Mexico. During his stay in Mexico he wandered the countryside looking for new plant species. In 1828 he found a beautiful shrub with large red flowers growing next to a road. He took cuttings from the plant and brought them back to his greenhouse in South Carolina. Even though Poinsett had an outstanding career as a United States Congressman and as an ambassador he will always be remembered for introducing the poinsettia into the United States. In the early 1900s the Ecke family of southern California grew poinsettias outdoors for use as landscape plants and as a cut flower. Eventually the family grew poinsettias in greenhouses and today is recognized as the leading producer of poinsettias in the United States. 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「Euphorbia subg. Poinsettia」の詳細全文を読む スポンサード リンク
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