F-9 is Autumn's Aster. I would make the base and applique the four leaves on. Do you know how to sew curves? Pinning is quite helpful. You need to put the piece that looks pregnant on the bottom..that's how I remember (pregnant ladies like to lie down to rest!!)
It seems like it will be easier to sew those down, then do the applique on top.
Any other thoughts out there?