Looks like a Bachelor's Button or cornflower to me. Centaurea cyanus. I think it's a re-seeding annual. Some centaureas can be invasive, but I don't think this is one of them. It's not a wildflower, it's native to Europe.

I agree with pauln.

Looks like bachelor buttons to me too. They grew along the roadsides in ETX. I beleive they were originally planted.
vickie

Thanks! I figured it was something common and hated to ask. lol Bachelor's Buttons sounds quite familiar to me. I've just never planted them before.