These reminded me of something like a moon flower or an open hollyhock (and yes, a poppy) from back east, except of course it’s a thistle plant here in Wyoming and other neighboring states too. It’s really quite an impressive bloom (given it’s growing somewhere you don’t need to pull or move it).
The blueish hue of the stems is a nice contrast with the green buds and white frilly blooms. A very fragile-looking bloom but in actuality, it’s one tough plant.