Wow Sarah this is really a beauty, this flower is certainly sporting a glory of its on and the shadow play, awesome. Your clarity and the color is super great!!! Thanks for sharing this :)
While this is a very nice looking flower, I don't think your straight on angle does it justice. Also be mindful of your background. Try getting the flower with the foliage in the background and try to minimize the house in the background. I'd also have to say mind the lighting. The lighting conditions in this are not optimal as you're getting some really odd shadows on the flower with the sun both backlighting and fill lighting the flower. Focus, sharpness and clarity are very nice in this.
JJ :D~