A poppy was my first thought, but just as quickly I discarded that. It was much smaller, just a couple of centimeters across, and on closer inspection it doesn't look like a poppy either. But what is it? I don't know...
Seen at an open spot on the Sonnenberg, north of Naturns. It wasn't all that far away from some buildings, so it's not necessarily indigenous.
17 July 2013.