Whoops. This was supposed to have gone up yesterday; I forgot.
Maybe I've been watching too much RuPaul's Drag Race, but I can't help but think of what a strange shoe design this could become, in the right hands.
P. malipoense is sometimes called the "Jade Slipper Orchid;" there were two at the show, and neither one looked green to me, but the greenish color is more obvious in some of the other photos on-line. The species wasn't described until 1984, and is from China and Vietnam (this link is more specific).