The background is distracting. Next time try to keep more distance between your subject and the background. I also think that black would have been better than this blue. But thank you for making me discover this flower (until know I only knew the Calla and the Cana, but never heard of the Cama)
I'm glad you used a background of some sort (the all black background felt a bit overused in this challenge), but the photo lacks depth. The flower should be a few feet away from the background, and a sharp focus on the petals.