Source: missouribotanicalgarden.org Remembering


Dr. Peter H. Raven D


into one of the world’s leading centers for botany and became one of the most influential voices for biodiversity and conservation, passed away on April 25, 2026. He was 89 years old. For nearly four decades, Dr. Raven


served as President and Director of the Garden while also holding the George Engelmann Professorship of Botany at Washington University in St. Louis. When he assumed leadership of the Garden in 1971 at age 35, the institution was modest in scope. By the time he retired in 2010, he had transformed the organization into a global hub for research, education, horticultural display, and sustainability, with far- reaching scientific partnerships and conservation programs. Dr. Raven’s vast and varied list


of accomplishments at the Garden includes opening the Japanese Garden (Seiwa-en), the Margaret Grigg Nanjing Friendship Garden, the William T. Kemper Center for Home Gardening,


r. Peter Hamilton Raven, a botanist of global stature who transformed the Missouri Botanical Garden


and the Doris I. Schnuck Children’s Garden. He tripled the size of the Garden’s herbarium, helping make it one of the largest botanical collections in the world, and greatly expanded its library, now among the world’s most comprehensive botanical libraries and since named in his honor. Dr. Raven’s many global scientific contributions in this role include founding the Garden’s William L. Brown Center and the Center for Conservation and Sustainable Development, as well as launching numerous research projects, conservation programs, and partnerships across North America and in China, Madagascar, Peru, Bolivia, and Tanzania. Te staff had grown from 150 at the start of his tenure to nearly 500 by the time of his retirement. Tis expanded team, which had begun with just a handful of scientists, included close to 50 PhD-level research scientists undertaking pioneering work on the St. Louis campus and around the world. Dr. Raven’s influence extended well


beyond St. Louis. He contributed 35 years of leadership as co-editor to the monumental Flora of China project, reflecting his lifelong commitment to international collaboration in botanical science. Over the course of his scientific career, he helped shape the modern understanding of plant evolution and coevolution, and trained generations of scientists who now lead institutions around the world. An excellent network builder, Dr. Raven promoted scientific collaboration, connecting people with similar interests to one another to great synergistic effect. In 1985, Dr. Raven was awarded a


MacArthur Fellowship—often called a “genius grant”—in recognition of his originality and leadership in science and conservation. In 2000, he received the National Medal of Science from President Bill Clinton, the nation’s highest honor for scientific achievement. Dr. Raven was also awarded the National Friendship Medal from the Premier of China, the highest award offered to foreigners. He served on the Council of the National Academy of Sciences from 1983 to 1986 and was Home Secretary of the Academy from 1987 to 1999. He was also a Fellow of the American Academy of Arts and Sciences and 25 other Academies of Science around the globe. His many international honors


included the International Prize for Biology from Japan, 22 Honorary Doctor of Science Degrees, and innumerable Achievement and Distinguished Service Awards and Medals. A public advocate as well as a scientist,


Dr. Raven was named a “Hero for the Planet” by Time magazine in 1999. Throughout his career, he warned of the accelerating loss of biodiversity driven by population growth, consumption, and environmental degradation, urging international cooperation to address what he saw as one of the defining challenges of the modern era. Dr. Raven served on numerous


scientific boards and advisory bodies, including President Clinton’s Committee of Advisors on Science and Technology from 1994 to 2001 and as a trustee of the National Geographic Society. He was a life member of the Pontifical Academy of Science and raised awareness of the perils for biodiversity through his many lectures at the Vatican. A prolific author, he co-wrote Biology of Plants, a widely used textbook now in multiple editions, and Environment, another leading text in the field. In 2021, the Missouri Botanical Garden Press published his autobiography, Driven by Nature: A Personal Journey from Shanghai to Botany and Global Sustainability. Peter Hamilton Raven was born in Shanghai in 1936 to Walter and Isabelle Breen Raven. He earned his doctorate from the University of California, Los Angeles, in 1960 after undergraduate studies at the University of California, Berkeley. Early in his career, he conducted fieldwork in the highlands of Chiapas, studying folk taxonomy— an experience that deepened his appreciation for the relationship between people and plants and helped shape his lifelong commitment to conservation. Before coming to the Garden, Dr. Raven served for nearly a decade as a professor at Stanford University along with his favorite cohort, Paul Ehrlich. Dr. Raven is survived by his wife, Dr. Patricia Duncan Raven; four children, Alice Raven (Sam Stuhlman), Liz Raven McQuinn (Daryl McQuinn), Francis Raven (Carolyn Kousky), and Kate Raven (Katrina Schaffer); and the grandchildren, Noah, Nate, Louisa, and Rosvita. –Courtesy Missouri Botanical Garden


Summer 2026 FUNGI Volume 19:2 3


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