Beautiful. I'm curious... Did you photograph the whole leaf, and then crop it off, or was it partially cropped from the beginning? (I'm presuming a 2:3 (or similar) ratio camera...)
7 - Very nice. Good colors. Obviously you've gone for this specific crop/framing, and it 'works' in my opinion, but I still wonder whether a slightly tighter crop to the center vein, or else of course the 'whole leaf', may have given this more impact, especially for this Challenge. Possibly even just 'as is' but with a fraction more 'empty space' on the left, depending what is there, of course.
I have to say that I have some difficulty with the cropping choice (as I don't understand how this could be full frame...). The right part from the middle of the leaf makes that I'm not focusing on the pattern on th right what I think was the subject of your shot.
6.