Jane said silk — I was going to say satin. They are so beautiful. The striations in the petals really add some interest, and help to catch the eye — as if that saturated color couldn’t do it all by itself. I saw that reference to the Camas Prairie. I’m betting it got its name from another sort of flower.
I suspect that this Camas Prairie was indeed named for the camas flower which is a beautiful blue color too. Oddly enough though, I don’t recall seeing any there, but I usually don’t travel through there when the camas flowers are in bloom. A prairie area where camas grew was a very big thing for the Indians native to that area because camas roots were a very valuable food source.