In color - http://www.pbase.com/image/82175327
I like the gradual change in tone carried through the petals from dark at the perimeter to light at the flower's center. It draws the eye in to the focal point, the center.
The flower's asymmetrical shape allows a nice non-bullseye composition where the petals can be evenly spaced from the top & left edges without having to center the focal point.