Benson, Lyman. 1969. The Native Cacti of California. Stanford University Press, Stanford, California.
Heil, Kenneth D. 1993. Familiar Cacti, from The Audubon Society Pocket Guides. Chanticleer Press, Inc., published by Alfred A. Knopf, Inc., dist. by Random House, Inc., New York.
Niehaus, Theodore F., author, and Charles L. Ripper and Virginia Savage, illustrators. 1984. A Field Guide to Southwestern and Texas Wildflowers. Houghton Mifflin Company, New York.
Spellenberg, Richard, author, and Susan Rayfield and Carol Nehring, visual key. 1979. Thirteenth Printing, April 1994. National Audubon Society Field Guide to North American Wildflowers, Western Region. Chanticleer Press, Inc., published by Alfred A. Knopf, Inc., dist. by Random House, Inc., New York.
Weniger, Del. 1984. Cacti of Texas and Neighboring States. University of Texas Press, Austin, Texas.
Books on Rhododendron:
Salley, Homer E. and Harold E. Greer. 1992. Rhododendron Hybrids, Second Edition. Timber Press, Portland, Oregon.
Salley, Homer E. 2000. Rhododendron Hybrids, Third Edition, on CD ROM, available from the American Rhododendron Society.
Books on wild plants:
Niering, William A., and Nancy C. Olmstead, authors, and Susan Rayfield and Carol Nehring, visual key. 1979. Thirteenth Printing, December, 1992. National Audubon Society Field Guide to North American Wildflowers, Eastern Region. Chanticleer Press, Inc., published by Alfred A. Knopf, Inc., dist. by Random House, Inc., New York.
Edible Wild Plants. Information available later. This book is currently on loan.
