Sunflowers and Friends is a light box bracketed high-key sequence combined in Photoshop. The sunflowers, echinacea, and other flowers are from our garden, and shown in In the field for transparency and I can only give my heart. The background is a sheet of old paper I put on a flat-bed scanner, and added in Photoshop using the same formula as the Dietes iridioides and Nigella Damascena images shown in Two Botanicals.
To learn more about the techniques I use to create this kind of imagery, please see my FAQs Photographing Flowers for Transparency, Using a High-Key Layer Stack, and Backgrounds and Textures. You can also check out my related webinar recordings (paid access is required): Painting in Transparency Using a High-Key Layer Stack and Using Backgrounds and Textures.