| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| A Field Guide to Pacific States Wildflowers: Washington, Oregon, California and Adjacent Areas | 978-0-395-91095-5 (0-395-91095-1) | 1998 | |
| A Field Guide to Southwestern and Texas Wildflowers | 978-0-395-93612-2 (0-395-93612-8) | 1998 | |
| Peterson Field Guide to Southwestern and Texas Wildflowers | 978-0-395-36640-0 (0-395-36640-2) | 1984 | Roger Tory Peterson |