The selective desaturation does not look right to me, I'm afraid. Some of it may be the harsh edges on the color to BW edges. When I do selective editing, I usually mask with a soft edged brush and often go back over the edges with a soften brush, to give it a more natural appearance.
The processing is a bit too grungy for me for a flower shot. And I don't quite get the point of green color - might as well desaturate green to leave the flower alone? Also, the harsh light fails to show off the flower as a gentle thing of beauty. Love the petal textures that came out because of this processing though. Looks like I'm not getting your intent here :(
I like how you used color to bring out the veins in the petals of the flower. I also love how a few of the leaves in the background are green, to make an interesting silhouette.
nice shot of the flower, the processing choices don't work for me, too saturated and bright on the flower and the desaturated background make it unbalanced for me