These references are used throughout this site and are referred to by the numbers preceding each entry.

1. Arnberger, L. P. and J. R. Janish.  Flowers of the Southwest Mountains.  1982.  Southwest Parks and Monuments Association:  Tucson, Arizona. 

2. Bowers, J. E. and B. Wignall.  Shrubs and Trees of the Southwest Deserts.  1993.  Southwest Parks and Monuments Association:  Tucson, Arizona.

3. Desert Shrubs.  1990.  Arizona Native Plant Society:  Tucson, Arizona.

4. Desert Trees.  1990.  Arizona Native Plant Society:  Tucson, Arizona.

5. Desert Wildflowers.  1991.  Arizona Native Plant Society:  Tucson, Arizona.

6. Desert Accent Plants.  1992.  Arizona Native Plant Society:  Tucson, Arizona.

7. Desert Grasses.  1993.  Arizona Native Plant Society:  Tucson, Arizona.

8. Dodge, N. N. and J. R. Janish.  Flowers of the Southwest Deserts.  1985.  Southwest Parks and Monuments Association:  Tucson, Arizona.

9. Elmore, F. H. and J. R. Janish.  Shrubs and Trees of the Southwest Uplands.  1976.  Southwest Parks and Monuments Association:  Tucson, Arizona.

10. Epple, A. O. and L. E. Epple.  A Field Guide to the Plants of Arizona.  1995.  Falcon Publishing, Inc.:  Helena, Montana.

11. Parker, Kittie F.  An Illustrated Guide to Arizona Weeds.  1972.  University of Arizona Press:  Tucson, Arizona.

12. Patraw, P. M. and J. R. Janish.  Flowers of the Southwest Mesas.  1959.  Southwest Parks and Monuments Association:  Globe, Arizona.  (out of print)

13. Philips, Steven J. and Patricia Wentworth Comus, eds.  A Natural History of the Sonoran Desert.  2000.  Arizona-Sonora Desert Museum Press: Tucson, Arizona.

14. Southern Arizona Wildflower Guide.  1992.  Tucson Citizen:  Tucson, Arizona.