— 1996] REVIEWS 343 An appendix provides a list of new names published in the text. These include 7 new species, one new subspecies, 11 new varieties, and 16 new combinations. The literature cited section, which is exclusive of the nomenclatural citations, runs 10 pagesand is atreasure-troveforthoseseekingadditional informationon themustards. It isdifficulttofindmuchfaultwiththis book. Althoughanumberoftypographical errors were noted, these are but minor distractions. I found none that seemed to alter the intended meaning of the text, or introduce confusion into the keys or technical descriptions. Perhaps my greatest complaint might be the seemingly arbitrary exclu- sion ofGreenland and the Caribbean islands from coverage. Surely inclusion ofthese regions would not have added substantially to the complexity ofthe text, and would haveroundedoutcoverageforanotherwisebroadlycircumscribed "NorthAmerica". Nevertheless, Rollins' work is an outstanding piece of taxonomic literature, worthy ofa place on the reference shelfofany serious botanist. — Steve Boyd, Rancho Santa Ana Botanic Garden, 1500 North College Avenue, Claremont, California 91711. Remarkable Agaves and Cacti. By Park S. Nobel. 1994. Oxford University Press, New York and Oxford. 166 pp. Hardcover and Paperback, $45, $22. ISBN 0-19- 508414-4, 0-19-508415-2 (pbk). This "remarkable" book examines three aspects ofagaves and cacti. The firstpart (Chapters 1-3) is a review ofpast and current uses ofthese desert and not-so-desert denizens. Agaves provide food, steroids, fodder, ornament, but most importantly bev- erages and fiber. Already, agaves produce 6% ofthe world's supply ofprecursors for corticosteroids. Certain cacti offer fruits and stems used as food, fodder, ornament, hallucinogens and carmine dye. Tells how Sicilians are able to produce larger and sweeter tuna fruits of prickly-pears. The red dye carmine, produced by cochineal scale insects farmedon prickly-pears, is a multi-use stain forarts, clothing, food, and cosmetics. In the 18th century, the value ofcochineal dye exported from Mexico was second only to silver. Cheap analine dyes largely replaced carmine, yet in 1992, 300 tons were produced, mostly in Peru; 80,000 to 130,000 female scale insects are needed to produce one kilogram ofdyestuff. The second part (Chapters 4-7) is a somewhat detailed discussion ofthe adaptive physiology of agaves and cacti. Explains water, C02 and mineral uptake, storage, and minimization ofwaterloss by agaves and cacti. Answers such questions as: Why do roots grow better under or near rocks? How do mycorrhizae enhance growth? How is water stored? Why are prickly-pear pads oriented in certain patterns? How do these plants endure very high and low temperatures? Why do stomates open at nightandcloseduringtheday?Which is themostefficientphotosynthetic pathway C3, C4 or CAM metabolism? How does spacing of plants affect productivity? The third part (Chapters 7-8) alerts us to the great, useful biomass production potentialofcertainspeciesofagavesandcacti,more sothannearlyanyothervascular plant group. The authorpredicts a bright future foragaves and cacti. The understand- ing ofmorphology and physiology should result in new technology that will enhance production and increase profit from farming cacti and agaves. The authoramazingly weaves his tale utilizing a couple handsful ofspecies oftwo diverse groups of plants, monocots and dicots. His engineering background shows throughhis presentationofformand physiology. This book should intrigue the grow- er who likes to experiment, the student who wishes to learn basic biology in a chal- lenging way, and the visitor to arid lands to become aware ofthe invisible activities occurring in the common desert agaves and cacti. The advanced student can learn from Dr. Nobel's many other books andjournal articles on these subjects. — Donald J. Pinkava, Department of Botany, Arizona State University, Tempe, AZ 87287-1601.