This stunning Begonia species is native to Borneo, and does well in terrariums with good air circulation. In my experience it is a slow growing plant, and prone to melting suddenly. When established it can form a large plant nearly 2′ in height. I’ve had it for years though, and it’s never gotten more than 8″. Maybe you will have better luck 🙂
There is also a red form of this species in cultivation, but I can’t seem to find it available. This one below is the green type, even though there is some red in the leaves.