Elsa, Yes they are bulbs. If the dutch iris do well for you, I'd imagine these would as well. The commonly available ones are fairly inexpensive if you wanted to try some out.
If you haven't already, check out
http://reticulatas.com/ - Alan McMurtrie has tons of pictures and info on his hybridizing project. He is the hybridizer of Eye Catcher.
Here's another that just opened today.
My Iris unguicularis finally bloomed. Last year it started blooming in late December or early January.
