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Monday, March 25, 2013

Cleistocactus hyalacanthus

The genus name Cleistocactus refers to cleistogamy - the term describing flowers that self-pollinate without opening. Cactus plants of genus Frailea re known to be cleistogamic in many occasions  but no Cleistocactus is really cleistogamic or even self-fertile.The small opening of those flowers, adapted for hummingbird pollination, resulted in confusion and name misapplication.

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