Hey thanks for looking everyone...I do appreciate it...and yes I will ask the guild friends.
I've always called them "ditch" lilies here. I looked in my wildflower book...Iowa Wildflowers of the Tall Grass Prairie and it is not listed in it. Have never heard them referred to as anything other than roadside or ditch lilies. I have some planted around an old steel bin to keep weeds down. Also started some in the lane on the rocky north side. They would have been blooming nicely right now had not MrOK mowed them off. Oh well they will be okay and the accompanying weeds are gone. At least he didn't put 2-4D there!