Society of Jesus | Royal Society | National Geographic Society | botany | American Cancer Society | World Economic Forum | Botany | Royal Television Society | American Physical Society | European Economic Community | American Chemical Society | International Society for Krishna Consciousness | American Society of Civil Engineers | Royal Society of Canada | Royal Geographical Society | American Philosophical Society | Theosophical Society | Royal Society of Edinburgh | Society of Antiquaries of London | United Nations Economic Commission for Europe | Society of the Cincinnati | Society for the Prevention of Cruelty to Animals | Organisation for Economic Co-operation and Development | Justice Society of America | Economic Community of West African States | American Mathematical Society | Royal Aeronautical Society | National Honor Society | Black Label Society | Students for a Democratic Society |
Illustrated talks on the edible plants of México to the Society for Economic Botany, and the Los Angeles County Arboretum and Botanic Garden.
Botanical Society of America, Certificate of Merit, August, 1992 "Inspiring and caring teacher, dedicated researcher, able administrator, president of the American Society of Plant Taxonomists, the Botanical Society of America, and the Society for Economic Botany, champion of the science of botany."