NAPCC Multisite Quercus (Oak) Collection


Bartlett Tree Research Laboratories Arboretum, Charlotte, North Carolina
Boyce Thompson Arboretum, Superior, Arizona
Chicago Botanic Garden, Glencoe, Illinois
Cornell Plantations, Ithaca, New York
Denver Botanic Gardens, Denver, Colorado
Donald E Davis Arboretum, Auburn, Alabama 
Holden Arboretum, Kirtland, Ohio
Landis Arboretum, Esperance, New York
Missouri Botanical Garden, Saint Louis, Missouri
Morris Arboretum of the University of Pennsylvania, Philadelphia, Pennsylvania
The Morton Arboretum, Lisle, Illinois
Mount Auburn Cemetery, Cambridge, Massachusetts
New York Botanical Garden, Bronx, New York
Rancho Santa Ana Botanic Garden, Claremont, California
Scott Arboretum of Swarthmore College, Swarthmore, Pennsylvania
Starhill Forest Arboretum, Petersburg, Illinois
Taltree Arboretum, Valparaiso, Indiana Provisional Status
The University of California Botanical Garden, Berkeley, California
UC Davis Arboretum, Davis, California
University of Washington Botanic Gardens, Seattle, Washington


Primary Focus:
Collection represents broad taxonomic diversity, including cultivars, with an emphasis on North American oaks

168 taxa, not including artificial hybrids, cultivars, or unidentified species
2,367 accessions, more than 500 of which are cultivars and artificial hybrids
41% known to be wild-collected

Oaks are among the most diverse and dominant trees in North America, so the genus Quercus was a natural choice for the first multi-institutional NAPCC collection. After almost two years of planning and coordination on the part of Dennis Collins, Curator of Plant Collections at the Mount Auburn Cemetery, 15 gardens with large oak collections were inducted into the NAPCC in August of 2007. Although the focus of the individual collections ranges from botanical and horticultural research to ornamental display, all of the institutions are committed to germplasm conservation and recognize the advantages of working collectively rather than independently.

The genus Quercus has been estimated to contain over 500 naturally-occurring taxa which are distributed throughout the northern hemisphere in a broad variety of climate zones and habitats. It would be virtually impossible to develop a comprehensive collection of oaks at a single garden due to climatic constraints. Having a multi-institutional collection with gardens in a variety of climate areas expands the possibilities for maximizing the representation of oak diversity. California, the Pacific Northwest, the Midwest, and the Northeast are already represented by gardens in the group. One of the goals for the group is to expand and recruit gardens in the Southeast, the Southwest desert regions, and Mexico in order to improve our representation of oaks from those regions.

In addition to collaborating on expanding the group's representation of oak diversity, the collection holders are also working together to raise standards for curatorial management, to promote research use of the collections, to interpret the value and importance of oaks to garden visitors, and to identify and help solve taxonomic problems. A newly-formed Oak Curatorial Group with representatives from all gardens is taking on these important challenges. Starhill Forest Arboretum joined the Quercus Multisite Collection in 2009, and Donald E Davis Arboretum at Auburn University joined in January 2010. These were followed by Bartlett Tree Research Laboratories Arboretum and Taltree Arboretum at the end of that year, with the latest addition of Boyce Thompson Arboretum in 2012.

Oak Collection Inventory

Oak Links

Taxonomic References and Authorities:
Flora of North America
Flora of China
Flora of Taiwan
Flora Mesoamerica
Flora of Missouri
Flora Europaea
International Oak Society Oak Name Checklist
Kew World Checklist of Selected Plant Families

USDA GRIN database
W3Tropicos database
2006 IUCN Red List of Threatened Species

Oak Multisite Collection Coordinator:
Greg Paige, Arboretum Curator, The Bartlett Tree Research Laboratories and Arboretum, 13768 Hamilton Rd, Charlotte, NC 28278
704-588-1150 ext 141