Yes Pheli, this species is in fact endemic (but quite common) to a small area of Central Thailand.
Bud, giving a light watering rest in winter might help.
Ctb, no usually the plants are covered with flowers. This time, it is a keiki who is curiously blooming.
Here is a photo of a bloom of the type species (without the 2 maroon blotches) :
Last edited by rastafouni; 11-04-2013 at 08:09 PM..