You are now entering
the 2020 series of photos of the
hybrid Epiphyllum.
EPIPHYLLUM COOPERI
photo 1
While it was long believed that this Epiphyllum was a hybrid of Selenicereus grandiflorus with Epiphyllum crenatum,
it is a botanical Epiphyllum: Epiphyllum crenatum var. kimnachii.
(Source: Henri Kuentz, kuentz.com)
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It would be a cultivar, a form found in nature, and multiplied under the name: 'cooperi'.
(Source: Joël Lodé, private correspondence)
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The flowers of this Epiphyllum often appear close to the ground, earning it the name :
'Bottom White'
Ep. cooperi has a diurnal flowering.
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