| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Wild Flowers of the United States, Vol. 3: Texas | 978-0-07-052633-4 (0-07-052633-8) | 1970 |
| Wild Flowers of the United States, Vol. 4: Southwestern States | 978-0-07-052636-5 (0-07-052636-2) | 1975 |
| Wild Flowers of the United States, Vol. 5: The Northwestern States | 978-0-07-052640-2 (0-07-052640-0) | 1966 |
H.W. · H.W. Rickett · H. William · Harold W · Harold W. Rickett · W R. · William R.