I really like this last piece, I started doing a quick paint-over (hope you don't mind) when I realized that @malcom pretty much said what I was trying to show. I'll upload it anyway so you can see what he was talking about.
You have at least 5 light sources (1 main ambient light, and the 4 glowing leaves) so you need to factor these lights in to tie them into the picture. Think about where there are in space, and how much light they are giving off.
You can use this to your advantage to add texture (the hair for example).
Also, you would see the reflection of the leaves in her eyes and bracelets which has already been said.
You could also push some of your darker values, like in the hollow areas in the hair around the arms to add a bit more depth.
I love the colour palette you have chosen for this too. Keep up the good work!