This is a primary hybrid between Zygopetalum maculatum and Promenaea xanthina.
Got it as a seedling for free at a show a bit over 2 years ago, and it's been happily growing since. It's a very easy and fast grower as long as it gets plenty of water.
The pics could be better, the waxy textured blooms make getting the lighting right a challenge.
__________________ Camille
Completely orchid obsessed and loving every minute of it....