Long before Europeans arrived, indigenous communities all over the world grew plants for subsistence, medicine and myriad other uses. Their small-scale cultivation stands in stark contrast to the export-driven, plantation-based monoculture Europeans introduced in the production of sugar, tobacco and cotton. This exhibition captures the spectacular range of early American gardens, from Mesoamerican chinampas to small plots of medicinal plants. Reading Room, John Carter Brown Library, 94 George Street.