Dr. Thomas L. Vaughan, MD, MPH
Dr. Vaughan is a professor of Epidemiology at the University of Washington, and the Head of the Epidemiology Program at the Fred Hutchinson Cancer Center. Dr. Vaughan just happens to have the same first and last name as the webmaster of MyNaturePhotos.com, and it turns out he shares a common interest in Nature Photography as well.
The first two (yellow flower of skunk cabbage, and leaf in fir tree) were taken in the Washington Arboretum in Seattle. The other two were taken last spring (2003) in the Palouse region of Southeastern Washington (near Idaho border). This is a spectacular region of rolling hills and wheat fields. The rainbow was one of those lucky shots where a large storm was gathering in the East, while a setting sun still bathed the farmhouse from the West.