The title does not quite capture the subject of this book. Dunmire charts the transplantation of scores of Old World domesticated plants, many of which are not Mediterranean in origin, to a region that is not quite New Spain. Instead, the analysis extends from the Caribbean and the Valley of Mexico in the south to the California missions, Arizona, New Mexico, and Texas in the north, with a sidelong look at Spanish Florida in the bargain. Dunmire’s chief concern is to figure out when various crops arrived where, and how their arrival altered agriculture, horticulture, and cuisine. It is, in short, the story of how this part of the Americas acquired a mestizo agroecology in the years between the conquest and 1840.When Spaniards first came to the Americas, among their ambitions was to figure out which crops would grow well in these unfamiliar surroundings. Disappointingly, familiar ones such as wheat, olives, and vines did poorly in most of the terrain they encountered. A long period of experimentation and adjustment followed, in which encomenderos, mission priests, settler farmers, and many others tried to find suitable crops to add to, or substitute for, those already cultivated by Amerindians. Indeed, Cortes himself wrote to King Charles V of the importance of sending food plants to Mexico and suggested it be made illegal for ships to set sail from Spain to Mexico without them (p. 112). Within decades, some imported crops had proved admirably adapted to local conditions, to the point that Amerindians eventually came to regard them as native species. Dunmire provides what I believe to be the most complete and detailed account of this process. If you want to know when the apricot was introduced to Arizona, the melon to Mexico, or coriander to the Caribbean, Dunmire can tell you.The book has no particular ax to grind. Dunmire offers it as a portrayal of a process rather than as a scholarly argument. He says (p. x) that the book is not about “agricultural politics, economics, gender and class dynamics, or environmental consequences.” Dun-mire is not an academic, but a former National Park Service naturalist, and is more interested in establishing the facts than in the sorts of issues and debates that historians and cultural geographers engage in. The book follows loosely in the tradition of Carl Sauer (Dunmire’s teacher) and Alfred Crosby, although with finer resolution, more detail, and less interpretation than one finds in Sauer or Crosby. Although Dunmire recognizes their importance (p. 181, for example), he is much less interested in animals and diseases than Crosby and much less concerned with cultural contexts than Sauer.The book begins with an account of crops, agriculture, and cuisine in Spain prior to the 1490s, emphasizing the legacy of Arab connections to the Middle East and Indian Ocean worlds. The next two chapters, both essentially narrative and descriptive, cover the same subjects in pre-Columbian central Mexico and in Sonora, Arizona, and New Mexico. With the stage thus set, Dunmire proceeds to his main drama, the entry of Old World plants into the Caribbean, Mexico, New Mexico before the Pueblo Revolt of 1680, Arizona, Texas, New Mexico again (after 1680), and finally, Florida and California. There is also a chapter on livestock and agricultural technology, mainly in Mexico. Each chapter concludes with a mini-essay on a particular plant or set of plants, explaining their origins as cultivars, their history before they were brought to the Americas, and various other matters.The research is based on published sources, including sixteenth- and seventeenth-century original sources, often in Spanish, sometimes in translation. It is a bit stronger for New Mexico and Arizona than elsewhere; Florida — a particularly unwelcoming environment for most of the Spaniards’ preferred crops — seems to deserve more than the four pages it gets. It is one of history’s ironies that 440 years after Spanish settlers began their struggle to find and import crops suitable for Floridian conditions, state officials are now trying their hardest to keep new plant species out.The prose is serviceable but without much zest. The tables are very useful, capturing a lot of the book’s information and presenting it in economical form, and the sketches of plants and various agricultural tools are welcome. The maps are also well done and helpful. The citation style is, however, thoroughly irritating: except for direct quotations there are no citations, and one has to hunt through back matter to see whether or not a given passage is attributed to a source or not. This may have saved on publisher’s costs, but it will cost readers time.