I'm not much for floral macros, so take this critique with a grain of salt :-)
I personally felt the light was a bit harsh, and perhaps as a result creating an overexposure by what seems like 1 ro 1? stops. As well, the aperture seemed like it could've gone one way or the other, but it's current setting might've been a little vague in choice.
That being said, it was still a nice shot! I hope this helps, and please take it all with a grain of salt! :-)