I found an interesting site through someone's blog, Virtual Sketch Date . Every month there is a reference photo posted a week before the dealine. You then sign up on comments and post your sketch on your blog on Sat. and Sunday all the entries are posted at Virtual Sketch Date. I started with contour drawings of the petals, continued from there and added watercolor.
This is the reference photo for Sept. I don't usually sketch from photos so this was a little different for me. It is great fun to see how everyone's sketches are the same but different. Wonder what next month will bring.
Robert Bateman 5" x 7" Sketchbook
Pen and Watercolor