And if I may be so free as to wave my little local patriotic flag:
the album form of hennisianum was discovered by the danish master orchid-gardener, Hans Christiansen, from Fredensborg, just outside Copenhagen.
The flower/plant was later published by Roeth and Gruss as Paph. hennisianum forma christiansenii.
Mr. Christiansens nursery is always worth a visit - and his selection much wider than seen on his homepage: https://orchidegartneriet.dk/