At the moment the star of the vivarium is Begonia schultzei. Where the orchids have not flowered yet this plant has been in flower almost continually, only taking a break to grow. When I bought this it was a smallish cutting about 5 centimetres long with three leaves. It stayed this way for months but in that time it has been in flower for a long time. Then it took a break from flowering to quadruple in size. It has now grown up into the tree fern root background and is now in flower again.
Funnily enough I do not like regular begonia's at all. I don't like their leaves or their flowers. However even though the flower of Begonia schultzei is unmistakeably a begonia flower it works well because it is so simple and small. A big plus is also that the leaves start out with a typical begonia shape but they soon transform into glaucous waxy ovate leaves that look especially good when wet.
All in all I would really recommend this plant for a vivarium or terrarium.