I realized I needed a good strong, dark green for some of the background so I picked up a Perylene Green (DS) and a Shadow Green (Holbein) and used those with a bit of Ultramarine Turquoise here and there. For the branches showing I just used a reddish brown I had on my palette - not sure what color it is but maybe a English Red Earth or something like that. By painting the background down from the top I got a bit of a bleed through onto the petals at the top but I can clean them up when it's dried and I'm ready to start the petals. The main thing is to keep the top petals pale and not lose the light shining through.
I'm still thinking - and I hope I'm thinking enough and in the right way to make this one a success. (Oh, and this is on 1/2 sheet Arches 140# coldpress paper.)
When I got to painting the leaves, I realized I'd "lost" some of them by covering over the drawing of them with the background! Oh, well, so it's different than the photo. I guess that's not necessarily a bad thing...but it shows me I got too rushed with the background at times and wasn't thinking and planning as much as I thought I was :(