Botany History

In 1637, one Dutchman paid as much for a single tulip bulb as the going price of a town house in Amsterdam. Three and a half centuries later, Amsterdam is once again the mecca for people who care passionately about one particular plant—though this time the obsessions revolves around the intoxicating effects of marijuana rather than the visual beauty of the tulip. How could flowers, of all things, become such objects of desire that they can drive men to financial ruin?

Collections of preserved plant specimens, known as herbaria, have existed for nearly five centuries. These pressed and labeled plants have been essential resources for scientists, allowing them to describe and differentiate species and to document and research plant changes and biodiversity over time—including changes related to climate. Maura C. Flannery tells the history of herbaria, from the earliest collections belonging to such advocates of the technique as sixteenth-century botanist Luca Ghini, to the collections of poets, politicians, and painters, and to the digitization today.

Are humans unwitting partners in evolution with psychedelic plants? Darwin’s Pharmacy shows they are by weaving the evolutionary theory of sexual selection and the study of rhetoric together with the science and literature of psychedelic drugs. Long suppressed as components of the human tool kit, psychedelic plants can be usefully modeled as “eloquence adjuncts” that intensify a crucial component of sexual selection in humans: discourse.