I have tried to grow Psychilis in the past and always lost the plants. I spent some time in the natural habitat of various species and found that they grew with their roots exposed. The place of attachment didn't seem too important as I saw them growing on seaside bushes just a few inches over the sand, trees and cactus. The common thread was that the roots were exposed to the air. Plants that fell to the ground invariably die, in places where these plants are abundant finding the remains of fallen plants is common. So here is my new attempt, the plant is tied to a piece of wood with nothing to retain humidity. Hopefully the cultural gods will smile and spare the life of this sacrificial victim.