Bulbs: Plant ID? Help! What is this?, 1 by MarthaMoye

MarthaMoye wrote:
If anybody can help me out, I'd appreciate it! This is a picture of a plant I've had for about 15 years now, and I have no idea what the name of it is. It has 2-3' long strappy leaves, and in August-September it produces these little pretty red flowers. The plant comes up from corms each year. I live in a zone 8, and it does fine here. (I originally bought it at the Monticello garden shop in Virginia, but now there isn't anything similar to it on their website to help me ID it.) Anybody have any ideas as to what this is? Thanks for helping...