Name this plant

Hello Niall

Can anyone tell me the name of this plant. Apparently it is a cactus orchid or orchid cactus? Common name is Ricrac plant. I would like to know if it is pollenated at night? The plant is growing in a pot in my garden in Durbanville and has flowered for the first time in 4 years. A fellow member of the garden club says hers flowers every year!

Zelda Wahl

 

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