This would probably be better if it was more simple -- it's hard to discern exactly what you want people to look at. I do see the Three, though, but wouldn't look for it except for your title.
the background is a tad washed out in the upper and lower right hand corners. it's so bright that it's almost consuming the subject. the little red part in the center of the photo look like the most in focus. I think that if the main subject is the prickly 3 that at least the prickly 3 should be in focus. the color of the leaves is very nice. a great shade of green. the reflections/glare in the leaves is also a bit distracting. good luck in the challenge.
I really like the lighting and the whole "feel" of this photo. You definitely met the challenge, while giving us something interesting and fun to look at!