Morris Arboretum

Morris Arboretum

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The 5th International Maple Symposium

This event is full. To be added to the wait list, please contact the Continuing Education department at 215-247-5777 ext. 125.

Date and Location:

Thursday and Friday, October 23 -24, 2014
Post-conference Tour: Saturday and Sunday, October 25 -26, 2014

Morris Arboretum of the University of Pennsylvania
Philadelphia, PA 19118

The 5th International Maple Symposium will be hosted by the Morris Arboretum and will showcase its highly regarded maple collection. Along with a lineup of internationally recognized maple experts, the symposium will feature garden tours to both public and private gardens.


Registration: $325 (includes lectures, breaks, lunches, and tours on Thursday and Friday)
Friday Night Banquet: $60
Saturday Tour: $75
Sunday Tour: $50


A block of rooms have been reserved at the Hilton Garden Inn Fort Washington for October 22, 2014 - October 27, 2014. The special room rate will be available until September 23rd or until the group block is sold-out, whichever comes first.

Book Online Now

Featured Speakers:

Complete Agenda

Click here for a printable PDF brochure

Special Thanks

The Morris Arboretum would like to recognize Chanticleer, A Pleasure Garden, as a co-sponsor of the Symposium. We would also like to thank the following for their support: Bob Boyer, Colibraro Landscaping & Nursery, Inc., Jay and Nanie Flaherty, Robert London, Lathrop Nelson, Peter and Bonnie Schorsch, and Joan Biddle.

Symposium Co-Sponsor:

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Anthony S. Aiello
The Gayle E. Maloney Director of Horticulture and Curator Morris Arboretum of the University of Pennsylvania, USA

Tony has served at the Morris Arboretum since 1999, where he is responsible for managing the historic gardens and living plant collections. He has participated in plant collecting trips to the Southern Appalachian Mountains, China, and Europe. Tony received his B.S. in Biology from Cornell University and M.S. in Horticulture from Purdue University. Since 2000, he has chaired the North America China Plant Exploration Consortium (NACPEC), and has been involved with several committees of the American Public Gardens Association, including the Acer and Quercus curatorial groups and the Plant Taxonomy and Nomenclature Section. His interests include trees and shrubs from the northern temperate regions, and in particular maples, flowering cherries, magnolias, hollies, and witchhazels. His other botanical interests include the history of horticulture and economic botany.


Dan Benarcik
Horticulturist, Chanticleer, Wayne, Pennsylvania, USA

A native son of the Delaware Valley, attended The University of Delaware. Dan has worked at Mount Cuba Center as the Woodspath Gardener, Sales Representative at Imperial Nurseries, and finally as Horticulturist at Chanticleer. For the last 21 years contributing to the creative team at Chanticleer in seasonal displays of the Courtyard Gardens. A highly regarding speaker, Dan is an avid gardener at home where he gardens with my wife Peggy Anne Montgomery.


Dan Crowley

Dendrologist, Westonbirt, The National Arboretum, Tetbury, Gloucestershire, England Dan Crowley works as dendrologist at Westonbirt, which is home to UK National Collections of maple species and Japanese maple (Acer palmatum) cultivars. Dan comes from an arboricultural background and has a foundation degree in arboriculture. He began working at Westonbirt in 2009 as an arborist, being appointed to the role of dendrologist in March 2013. He is a regular contributor to industry publications in the UK and frequently represents Westonbirt on national and regional broadcast media. Dan is currently undertaking a project to verify trees in the arboretum’s collection to improve the quality of curation at Westonbirt.


Piet de Jong
Retired, Botanic Gardens of the University of Utrecht and Station for Nursery Stock at Boskoop, The Netherlands

Piet’s research on maples started in 1966 and in 1976 resulted in a thesis titled ‘Sex expression in Acer L. A biosystematic study’. From 1977-1988 he was director of the Botanic Gardens of the University of Utrecht, with special attention for the Von Gimborn Arboretum. In that period he was one of the founders of the Dutch National Plant Collection and made study of the genera Betula and Euonymus. After Utrecht he became researcher at the Station for Nursery Stock at Boskoop and published on Malus and Tilia. His interest in maples remained and resulted in co-authoring Maples of the World in 1994 and lectures at former Symposia of the Maple Society. In retirement Piet is still active as volunteer in the Von Gimborn Arboretum with guided tours and growing and selecting plants. Last year he published a book on the Euonymus.


Douglas Justice
Associate Director, Horticulture and Collections at the University of British Columbia Botanical Garden and Centre for Plant Research in Vancouver, British Columbia

Douglas has been at UBC Botanical Garden since January 2000. Along with responsibility for horticulture and the living collections, his duties include management and instruction in the Horticulture Training Program. He teaches plant identification in the Landscape Architecture program at UBC. Throughout his working life, Douglas has been involved with a number of local and international horticultural groups, including the International Plant Propagator’s Society, the American Public Garden Association, the American Rhododendron Society, the Maple Society and the International Dendrology Society. An advocate for trees and the conservation of natural ecosystems, Douglas writes and speaks on a variety of plant-related subjects. He co-authored The Jade Garden: New and Notable Plants from Asia in 2005 with Brent Hine and the late Peter Wharton, and wrote a Field Guide to Ornamental Cherries in Vancouver with volunteers from the Vancouver Cherry Blossom Festival. Douglas’s most recent project is an app entitled Vancouver Trees; Identification and Ecology.


Richard Olsen
Research Geneticist at the United States National Arboretum, Washington, D.C.

Since 2006, Richard has worn multiple hats at the U.S. National Arboretum, including his current role as Acting Director. In this capacity, he guides the National Arboretum in its mission to enhance the economic, environmental, and aesthetic value of ornamental and landscape plants through long-term, multi-disciplinary research, conservation of genetic resources, and interpretative gardens and displays. When not directing, his primary responsibilities are in plant breeding and genetic resources, where he leads urban tree breeding and co-leads the boxwood improvement program. As lead scientist for plant germplasm program, Richard coordinates collection, characterization, evaluation, and distribution of unique plant genetic resources to researchers, botanical gardens, and industry.

Richard has a bachelor degree in landscape design (BS, NC State University, 1998), a master degree in horticulture (MS, University of Georgia, 2001) and a doctorate in horticultural science (Ph.D. NC State University, 2006).


Cor van Gelderen
PlantenTuin Esveld, Boskoop, The Netherlands

Cor van Gelderen, born in 1960 in Boskoop to a family business and traditional Boskoop nursery, in the heart of the Dutch nursery industry. Son of D.M. van Gelderen author of Maples of the World, Cor was fed maples for breakfast, lunch and dinner. Together with his father he wrote the book Maples for Gardens published by Timber Press and he is now the holder of the Dutch National Plant Collection Maple. The collection of his nursery, Plantentuin Esveld, contains over a thousand different maples, most of which are Japanese.


Alerts & Updates

The Arboretum is open as usual. Click here for hours.

Please note that weather conditions can change quickly, check back or call (215) 247-5777 before heading out for a visit.

Weather conditions may limit garden access to certain features even if the garden is open – please check the web site or call (215) 247-5777 for updates before visiting. Our visitors’ safety in the garden is our top priority. Therefore when inclement weather is predicted, we will make decisions about closing the garden accordingly.