| | [這篇文章最後由shukae在 2006/05/02 01:31am 第 3 次編輯]
小弟最近在看 Hylocereus 屬的品種
整理一些資料給大家參考
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統稱 學名
黃龍果 Hylocereus megalanthus
Cereus megalanthus
Mediocactus megalanthus
Cereus triangularis
Selenicereus megalanthus
Hylocereus triangularis
Hylocereus cubensis
Hylocereus compressus
Cactus triangularis
火龍果(白肉) Hylocereus undatus
Cereus undatus
Cereus tricostatus
Hylocereus tricostatus
紅龍果(紅肉) Hylocereus polyrhizus
Hylocereus ocamponis
Hylocereus costaricensis
Hylocereus purpusii
Cereus polyrhizus
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Hylocereus purpusii 紅皮紅皮紅肉火龍果橢圓果實(外皮辦帶綠色)
Hylocereus triangularis 黃皮白肉(紅肉)橢圓果實
Hylocereus costaricensis 一般純紅皮紫紅色肉正圓果實, 菜市場可買到
Hylocereus guatemalensis 一般野外看的三角柱應該是這個品種, 自交不親和
Hylocereus ocamponis 紅皮暗紅色肉圓形果實的品種
看了很多文件
我覺得用 Hylocereus costaricensis 可以完全取代 Hylocereus guatemalensis
根據國外文件指出 Hylocereus costaricensis不只長勢強健
而且莖寬可以到10公分, 而且可以自交結果 
取得更容易, 菜市場買圓形果實深紅皮紫紅肉的紅龍果就對了
不過這品需要大量的水分供應才長得好~~
(圓形紅皮暗紅色肉那種不是喔, 要紫紅色肉的)
Hylocereus costaricensis
This is a very strong growing species with stems that grow to 10-centimetres (4-inches) across. New branches are greenish or reddish at first, but quickly turning grey-blue. Usually, the stems are three angled with thin ribs to begin with, developing to more stocky ribs as the branch matures. Furthermore, their margins are usually straight or very shallowly, and smoothly indented, never horny. Brownish spines that emerge from the areoles are short, and stout, in groups of two to four. As the plant matures, it produces white flowers that are more than 30-centimetres (12-inches) long, followed by scarlet, oblong fruit.
Its natural habitat is in Costa Rica.It shares a similar climate as H. costaricensis and has an annual average precipitation of 2540-millimetres (100-inches).
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2006/03/18 10:49pm 
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呵~~~真是好方法，
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