Need some plant suggestions

Hello all -

I'm looking for some plants for the backyard and wanted to see if I could get some ideas here. I currently have a large tree fern, a couple types of ginger, several types of bromeliad and pagoda plant. My challenge is that the area is shady. We are in Florida and it is hot, but we're in an odd zone that tends to get below 20 degrees a couple of times in the winter (I'm a bit north of Tampa). Do you all know of some semi hardy bamboo that can handle shade or some other type of smaller, atractive tree that can handle shade? Also, I was considering planting some hostas - any advice on those?

Thanks!