I have had these things for years! and I had them planted in the wrong place, b/c for 6 years I never seen the first bloom. I dug these up at my mother's house about 7 years ago and they were old plants and she even said she didn't know for sure if they would bloom anymore or not...but after we tore our old deck down I had to transplant them b/c I couldn't stand to see them get stomped on by the kids. So last year was the first time they bloomed and there was only 4 blooms in all. Now this year they have decided to show their true colors! and they are blooming their little heads off. So now what is the name of them??
Amas look more purple in the picture to me. Hard to say with out seeing it in person. It would help if you could get a little history. Does your Mom know how old they are?? Maybe they were there before she was?? Maybe it's been passed around for a few generations.
It's nice that it bloomed for you. It must be a survivor!!