Interesting. The bracts opened but the petals didn't. I've had this partially happen with my Amethyst before--half open and half closed--but never the complete flower like this.

Every flower on that one branch is deformed to some degree. It's not really a deformity the petals just don't open. There's been 5 more blooms on that branch, all weird. The other branches on the same plant have perfectly normal blooms. I wonder what is causing it. The branches and foliage look fine. Here's another deformed flower.
Karyn