Maple elemental study

A few days before I moved from my old apartment I was walking around my hood and found scattered leaves from the poor trees that were suffering from draught. Since I already had an idea of drawing plant elementals, I picked up some leaves and seeds for reference and drew this in my sketchbook:

Graphite pencil and watercolor in a Canson sketchbook. I plan to turn this into a digital painting so critique is very welcome.
Here are some steps from sketch to finish: