I've used Schefflera arboricola (Dwarf Schefflera) that looks like this photo: http://www.juliusroehrs.com/album/images/ScheffleraArboricolaVarBush10_jpg.jpg I've been using them for a few years. Some didn't do well and others have done really well. Once they've settled-in, even drenching them with 20 minutes twice a day (a quart each misting) doesn't seem to hurt the hardy ones. They have nice thick and thin stalks. A couple of the plants have grown such that the stalks reached the top of the enclosure and went sideways making some extra nice perches.