Betsy, I was thinking Roses in Snow though it usually has more of a white edge. Julie is right about the stats. Could you share those?
I wonder if your yellow could be a species daylily? It certainly has that trumpet shape.
Here's one I'm not sure about. I think it's Tetrad and know I've had that.
It bloomed very early, is 100% poly. Yellow blooms, as you can see and 4". The scape is very short but that happened on several of mine that are blooming early.