| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| An Illustrated Flora of the Northern United States and Canada, Vol. 1 | 978-0-486-22642-2 (0-486-22642-5) | 1970 | Nathaniel L. Britton |
| An Illustrated Flora of the Northern United States and Canada, Vol. 2 | 978-0-486-22643-9 (0-486-22643-3) | 1970 | " |
| An Illustrated Flora of the Northern United States and Canada, Vol. 3 | 978-0-486-22644-6 (0-486-22644-1) | 1970 | " |