This oddball plant from Ecuador is on the temperamental side, and seems to prefer sphagnum over clay or potting soil. It likes low-medium light and has a beautiful purple leaf underside. It grows well on a horizontal branch, and with time may even grow up a mostly vertical surface. So far, it has only reached about 5″ in diameter but may get larger given time. The lower leaves are prone to melting, so take care not to overwater. The more mature foliage has a nice white/green stripe down the middle, and the leaf edges have a subtle pink tint.
And below, a newly unfurling leaf with purpled edges,