I think this is Cow Itch Vine, ( Cissus trifoliata). But the literature I read said the flowers were green. Little beetles seem to be the main pollinators. 1: Chemical Engineering Plant Cost Index Download Table Nuclear Plant Security Union of Concerned Scientists Flowers Plants Toxic To Cats And Dogs Clearance Non Toxic Plants For Animals Factory Sale Common Toxic And Non Toxic Plants For Dogs And Cats Red Dog Blue Kat Belle Fiori's December Plant of the Month The Christmas Cactus