The first two concentrate solely on botanical painting, while the August course includes the option of creating an artist's book as well. Description from illustrationweb.com. I searched for this on bing.com/images
Diospyros (persimmons). Watercolour (1907) by Deborah Griscom Passmore (1840-1911). "U.S. Department of Agriculture Pomological Watercolor Collection. Rare and Special Collections, National Agricultural Library, Beltsville, MD 20705"