John Hartigan Jr. uses ethnography to access the expertise of botanists and others engaged with cultivating biodiversity, providing various entry points for understanding plants in the world around us. He begins by tracing the historical emergence of race through practices of care on nonhumans, showing how this history informs current thinking about conservation. With geneticists working on maize, Hartigan deploys Foucault's concept of care of the self to analyze how domesticated species are augmented by an afterlife of data. In the botanical gardens of Spain, Care of the Species explores seed banks, herbariums, and living collections, depicting the range of ways people interact with botanical knowledge. This culminated in Hartigan's effort to engage plants as ethnographic subjects through a series of imaginative "interview" techniques.--COVER.