Paph. delphi flowered weirdly

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The blossom never made it out of the leaf axils. I acquired this one several years ago, as a deflasked youth. It's a cross developed by a friend between delanatii and phillipinense. I noticed the flower had fully opened while still tucked down in the central leaves where the flower stem would normally emerge? Might this be cultural or hybrid related? I have spicerianum and Song of Love nearby that are both blooming normally, if that reveals anything about my cultural habits.... Thanks.