I went over to a nearby park this afternoon, not expecting to see mounds of California sunflowers everywhere. I had some 6 X 12-inch paper with me which I had previously tinted with a rich blue-green casein. It was a perfect start for this composition.
I worked with gouache for the tree and flowers. Later at home I used Procreate on my iPad to add more orange, green, and the three large flowers. Finally, I copied and pasted some of the tree foliage over edge of sky beneath the tree.