I'm no plant expert, but (again from Ray) I've learned that there are orchids that do well in terrariums. Ray has one species in a couple of his terrariums, but I'm not sure what it is. Rich at Black Jungle is a plant expert so it might be worth shooting him an email (please mention this web site if you do contact him). I'm going to email this thread to Ray because he might get a kick out of it and he might also be able to help with the orchids.