Vince Marrocco

Gayle E. Maloney Director of Horticulture, Morris Arboretum & Gardens

Vince Marrocco has spent more than 30 years as a horticulturist at the Morris Arboretum & Gardens. Trained in the science of plant cultivation, Marrocco’s work is focused on improving the growth, maintenance, and cultivation of a wide variety of ornamental and native plants at The Morris. Currently, he serves as the Gayle E. Maloney Director of Horticulture where he oversees a team of horticulturists and garden volunteers. He holds a bachelor’s degree in horticultural science from North Carolina State University and a post-baccalaureate Certificate from the Wharton Management Program at Penn.

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Julie Ellis

Adjunct Associate Professor of Pathobiology and Senior Research Investigator, University of Pennsylvania School of Veterinary Medicine; Co-Director, Wildlife Futures Program

Julie Ellis is an ecologist with over 20 years of experience leading wildlife health projects and programs in the Northeast U.S. Ellis co-directs the Wildlife Futures Program, a novel partnership between the Penn Vet and the Pennsylvania Game Commission aimed at strengthening the resilience of the Commonwealth's 480 species of birds and mammals through wildlife health surveillance, research, and outreach to inform and improve wildlife management in Pennsylvania and beyond. She holds a B.S. and an M.S. in Systematics and Ecology from the University of Kansas and a Ph.D. in Ecology and Evolutionary Biology from Brown University.

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Madeline Baroli

Climate Adaptation Specialist, Northern Institute of Applied Climate Science (USDA Forest Service)

Madeline Baroli is a Climate Adaptation Specialist with the Northern Institute of Applied Climate Science (NIACS) where she works to integrate climate change adaptation and land management planning efforts. Baroli also coordinates NIACS' Urban and Community Forestry adaptation services, which provide resources and trainings that address the unique vulnerabilities and opportunities that climate change creates for urban forests. She completed her bachelor’s degree at the University of Michigan's School of Environment and Sustainability, and her master's in Forest Conservation at the University of Toronto.

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William Cullina

William Cullina is the F. Otto Haas Executive Director of the Morris Arboretum & Gardens. Prior to joining the Morris, he was the President and CEO of Coastal Maine Botanical Gardens for 8 years. He holds degrees in plant science and psychology and has been working in public horticulture for 30 years. He has extensive experience in commercial nursery production as well as a background in horticultural and forestry research. Cullina is a well-known author and a recognized authority on North American native plants.

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Alexandra (Lexa) Edsall, GCP’16, GCP’17

Co-Vice Chair, Advisory Board of the Morris Arboretum & Gardens

Since joining The Morris’s Advisory Board in 2020, Lexa Edsall has been an active member of the Arboretum’s Master Planning Working Group. Edsall has a deep career in politics and law, serving in the offices of the deputy attorney general and the solicitor general at the US Department of Justice; as an associate at Covington & Burling; as a judicial clerk to Supreme Court Justice Ruth Bader Ginsburg; and as senior adviser to the general counsel at the US Department of the Treasury. Edsall earned her BA and law degree from Harvard University and has a Master of City Planning degree from the University of Pennsylvania’s Stuart Weitzman School of Design.