Dend. cuthbertsonii is a micro-mini species from New Guinea with huge, colorful flowers that last up to nine months. It requires cool temps and can be temperamental.
Nice one, Ron. I just paid Andy P $50 for a small piece of his semi-alba. I kinda suspect it will be a creamy yellow/creamy white one though. Years ago, I sprayed with oil-based insecticide and killed my white cuthbertsonii(sparkling white with color lip. **they all have color lip, no pure white cuthbertsonii that I know of), and I am still crying over it.