Help Identifying My Flowers?

[plumtreeblossom.livejournal.com]

This summer I've been making a beginner's effort at growing wildflowers from seed in my tiny front yard. We used to have the ugliest yard on the street, but the rugged little wildflowers are improving it. I put down a Northeastern seed mixture that I bought online of about 30 different wildflower species, and so far 6 varieties have bloomed. I've been able to identify all of them except this one:



Does anyone know what it is? This individual one is silver dollar sized, but there are others of it's kind that are smaller, or less ornate with the red. They're on fuzzy, sturdy stalks, and grow low to the ground. It's lovely, but I've found nothing online to match it up to.

Thanks for any help!