Reptile chanel plant list says umbrella is ok. But the other site says they both are skin irritants and cause digestive problems and swollen mouth. I'd get a snake plant, and the pots the come in are huge, easily split that up into 4. Rubber tree, not the maroon color one, and a hibiscus maybe, if u want a tree.
The non toxic fiddle leaf fig bends easy to fit in a big your viv , oakleaf and creeping fig are toxic, but mike and clownfire are using them for darts, I think it's unwise, but they aren't going to be sleeping on it like tree frogs.
See peep use split leaf philodendron, and that's toxic also, u can tell by the smell, break a leaf and it's real a noxious aroma. If u see something u like and don't have a plant book with, snap and sniff.
I would check those two site I said, sorry I can't cut and paste to make it easier, I'm just on a phone. Sorry. And I noticed my girl turned dark right where a leaf had touched her, so there's another sign to look for.