Nice job here. I like the effect of the selective desaturation, but one of it's drawbacks is the occasional degradation in spots. Here, it seems to have affected a few different streaks on the petals. An easy fix of cloning would cure this, and be worth the trouble.
Having said that, I really do like the color scheme here, and the resulting visual impact.
Please, even if you don't visit my gallery, check out my "Faves".I've left them intact since day "1", and would like it if every image there got the attention they deserved.