Bulbophyllum praetervisum alba
Blooming size plant available for sale on offer at $80.  
Only 1 plant available. 
The plant has 7 growths.
This alba form of praetervisum is quite rare and difficult to come by. The flowers are pure white in colour, around 5 cm in size. This species flowers easily in local weather. This plant is grown from a cutting, the flower images are from the parent plant.