I've had this about 10 years and I suspect it may be tetraploid, but I do not know the origin and I've forgotten where I bought it. For the first 3-4 years it produced a single flower, but then it took off. It is probably the hardiest orchid I grow and doesn't seem to care if I occasionally forget to water it. The flowers are not flat, but they are still more than 4 inches across. Mike