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People regularly use plants for a wide range of utilitarian, spiritual, pharmacological, and dietary purposes throughout the world. Scholarly understanding of the nature of these uses in prehistory is particularly limited by the poor preservation of plant resources in the archaeological record. In the last two decades, researchers in the South Pacific and in Central and South America have developed microscopic starch grain analysis, a technique for overcoming the limitations of poorly preserved plant material.
 
Messner’s analysis is based on extensive reviews of the literature on early historic, prehistoric native plant use, and the collation of all available archaeobotanical data, a review of which also guided the author in selecting contemporary botanical specimens to identify and in interpreting starch residues recovered from ancient plant-processing technologies. The evidence presented here sheds light on many local ecological and cultural developments as ancient people shifted their subsistence focus from estuarine to riverine settings. These archaeobotanical datasets, Messner argues, illuminate both the conscious and unintentional translocal movement of ideas and ecologies throughout the Eastern Woodlands.
 

For over a century, plant specialists worldwide have sought to transform healing plants in African countries into pharmaceuticals. And for equally as long, conflicts over these medicinal plants have endured, from stolen recipes and toxic tonics to unfulfilled promises of laboratory equipment and usurped personal patents. In Bitter Roots, Abena Dove Osseo-Asare draws on publicly available records and extensive interviews with scientists and healers in Ghana, Madagascar, and South Africa to interpret how African scientists and healers, rural communities, and drug companies—including Pfizer, Bristol-Myers Squibb, and Unilever—have sought since the 1880s to develop drugs from Africa’s medicinal plants.

           

Osseo-Asare recalls the efforts to transform six plants into pharmaceuticals: rosy periwinkle, Asiatic pennywort, grains of paradise, Strophanthus, Cryptolepis, and Hoodia. Through the stories of each plant, she shows that herbal medicine and pharmaceutical chemistry have simultaneous and overlapping histories that cross geographic boundaries. At the same time, Osseo-Asare sheds new light on how various interests have tried to manage the rights to these healing plants and probes the challenges associated with assigning ownership to plants and their biochemical components.   

           

A fascinating examination of the history of medicine in colonial and postcolonial Africa, Bitter Roots will be indispensable for scholars of Africa; historians interested in medicine, biochemistry, and society; and policy makers concerned with drug access and patent rights.