Lighting shows off the dry autumn leaf in nice, crisp detail. The white backdrop gives the composition a rather stark and sterile environment though. The stark white does not complement the gold/brown hues with projecting/capturing the mood of autumn but it does show off the leaf with textbook detail. Well exposed and has great details I just think that it needs something more (different color backdrop with warm hues perhaps) to add to the composition.
while i like this image and i'll give it a good score, i'd love to have seen it more bold and daring and have the leaf in a corner or somewhere strange, as if to be the accident on an image of white. of course that's just me, but still i'd like to see it. technically speaking i think you've done a great job.