I will try to suggest a few off the safe list. :
Hibiscus- rosa-sinensis- should be able to find small one easily but do like warmth and light so not the best for the montanes unless you switch them out. beautiful flowers.
COLEUS- Can get these in just about any color or combo.
EMERALD RIPPLE also PEPEROMIA- Have seen pretty colors and textures
FUCHSIA- beautiful flowers but usually needs to hang
GLOXINIA or AFRICAN violets- just have to get the lighting right
HOYA also WAX PLANT- There are some with pink veragation that are bright. Vines but can hang or vine up.
KALANCHOE- Lots of different choice flower colors
PRAYER PLANT- some colorful leaves
ZEBRA PLANT
These are some I have seen as inside house plants so worth a try. Now if you set up outside enclosures then way more choices. This is the list I was looking from.:
http://www.bluebeastreptile.com/plantlist.htm
Hope some help give Ideas.
Pattie