| title | ISBN-13 | year of publication |
|---|---|---|
| Guide to Colorado Wildflowers: Mountains | 978-1-56579-513-6 | 2005 |
| Guide To Colorado Wildflowers: Plains and Foothills | 978-1-56579-512-9 | 2004 |
| Mountains - Guide to Colorado Wildflowers Volume 2 | 978-1-56579-119-0 | 1995 |
| Plains & Foothills - Guide to Colorado Wildflowers Volume 1 | 978-1-56579-118-3 | 1995 |