If it is actually a species, it is probably Paph. primulinum var. alba. Chances are far better that it is actually a hybrid called Pinocchio (primulinum x moquettianum), or Avalon Mist (Pinocchio x primulinum).
Pinocchio is the most popular hybrid in this group, and you see it everywhere. For good reason, it blooms sequentially and continuously, sometimes for over a year on one spike, as you have probably already determined. Never cut the spike on this.