Abstract
From records on plants and herbs made by doctors, healers, missionaries, and colonial administrators in the seventeenth and eighteenth centuries, this article explores ways of constructing knowledge about flora using the concept of circulation proposed by Kapil Raj. The distinct experiences and documents analyzed demonstrate the process of observing, collecting, systematizing, and circulating knowledge, and the influence of natural history and the Hippocratic tradition on the classification of herbs and plants and on the descriptions adopted in these texts. From printed books to notes scattered through travel diaries, usefulness of these species to humankind was the element valued by those who directly observed the potential of American plants, fruits, and herbs.
circulation; history of plants; medical practices