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Cleistocactus hyalacanthus : ウィキペディア英語版 | Cleistocactus hyalacanthus
''Cleistocactus hyalacanthus'' is a species of columnar cactus in the genus ''Cleistocactus''. The name comes from the Greek ''kleistos'' meaning closed because the flowers hardly open. ''Cleistocactus hyalacanthus'' flowers sprout from the center of needle clusters. They first appear as small dark spots, which gradually enlarge over a week or ten days into long red flowers, each of which is only open, and only slightly, for one day. They are food for hummingbirds, which are attracted by the vivid red color. Those flowers that have been fertilized will develop a fruit which is 1 cm in diameter. The fruits eventually turn yellow when they are ripe. They are food for larger birds, which disperse the small black seeds in their droppings. ==References==
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「Cleistocactus hyalacanthus」の詳細全文を読む
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