Great colors and detail. If it wasn't for the sharpness surrounding it, the center would seem almost soft (optical illusion I believe). Is there a person in the background? Or is that just a trick of the light? It looks like a man wearing a red shirt- I'd take that out- that is my only criticism of this shot.
As soon as I saw this photo, I wished the petals extended past the frame.
I am talking about the parts that are cut off (both left and right, about one third from the bottom). I think it would look really good if they "reached out" beyond the frame.
I love the rest of the image, very pleasing colors and triangular composition.
I like the border as well. It makes it look finished. The color of the iris is beautiful, not to oversaturated, nice and clear. Lighting and composition are perfect IMO. One suggestion would be to get rid of the green in the upper right up against the border. But awesome flower shot!