Current distribution of illustrated botanical species:

Alabama, Alaska, Arkansas, California, Connecticut, Delaware, Florida, Georgia,
Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland,
Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska,
New Hampshire, New Jersey, New York, North Carolina, North Dakota, Ohio,
Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, Tennessee, Texas,
Vermont, Virginia, Washington, West Virginia, Wisconsin