Jillz pretty much nailed this one. It doesn't have a high registered bloom count, anyway (14). Because of that, I tend to get only three weeks of blooms from it. Still, it's an awesome, unique color combination which looks great with yellows.
Last season I crossed it with Goldner's Bouquet both ways (some as the pod parent, some as the pollen parent), so I won't know what it's kids look like until next summer, but it is fertile both ways. ...really can't wait to see the kids, because the plants look so great together.
Matchless Fire with Marietta Screamer
Only pic I could find with a yellow. That little orange fuzzball in the lower left corner is Matchless Fire.