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Hylocereus polyrhizus

Common Name(s):
Synonym(s): Cereus polyrhizus, Hylocereus monacanthus

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Subfamily: Cactoideae Tribe: Hylocereeae	Distribution: Costa Rica : Nicaragua : Panama : Colombia : Ecuador (Central America, North America) Habit: Angled
Flower: White	Encounterability: Rare

Species Notes:

The name can not be typified. It COULD be an juvenil form of any Central American Hylocereus. But the type is a five angled plant and flowers are unknown. The name is best discarded. Usually plants with this name belong to H. monacanthus or H. costaricensis. I would say the two photos of your is H. monacanthus and Matt Cheney's photo is H. costaricensis.

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