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パラグアイの原産種を、わが国で改良した園芸品種です。葉緑素をまったく持たないため全体が赤く、台木に接ぎ木をして育てられます。ふつうには「さんかくちゅう(Hylocereus guatemalensis)」が台木として使われるようです。
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サボテン科ギムノカリキウム属の球状サボテンで、学名は Gymnocalycium mihanovichii var. friedrichii cv. Hibotan。英名は Moon cactus、Ruby ball。
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The Moon cactus (Gymnocalycium mihanovichii var. friedrichii cv. Hibotan) belongs to Cactaceae (the Cactus family). It is a ball cuctus that is a horticultural variety that was improved in Japan from a species native to Paraguay. It has no chlorophyll and is entirely reddish, and is grown by grafting onto a rootstock. The American beauty (Hylocereus guatemalensis) is usually used as a rootstock.
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韓国・京城(ソウル)市「南山(ナムサン)植物園」にて、2004年06月19日撮影。
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