GOAL: Since there was so much color in this photo I thought I would try to single out the leaf via selective color.
What I did (in Paint Shop Pro XI):
-Crop
-Duplicated layer
-Desaturated and colorized sepia (15)
-Erased leaf on duplicated layer
-Unsharp mask (35) on sepia layer
-Adjusted histogram midtones (-13) on sepia layer
-Unsharp mask (20) on color layer
-Merged layers
-Cloned a little around the flower petal edges to better blend into the leaf
-Added borders