Look at "Dantes Welcoming Party" he has one in his cage... I think tis the same plant.
But
You may also want to add some other plants anyway ie. ficus, schlefflera, or hibiscus. Although the above plant is a good addition to a cage, they should not be used as the primary plant.
I've seen it in a few cages around here in my research. They do have some toxicity but so do ficus. As long as they don't eat it and panther usually don't eat any greens; unless it's a hibiscus flower.