| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| The Plant World | 978-1-116-98870-3 (1-116-98870-4) | 2009 | F. H. Knowlton · Charles Louis Pollard · Cornelius L. Shear · Wild Flower Preservation Society |
| The Plant World, Volume 19 | 978-1-142-04050-5 (1-142-04050-X) | 2010 | Wild Flower Preservation Society |