Arboretum at Arizona State University Tempe, Arizona
Phoenix dactylifera (Date Palms) 300 taxa, 40+ varieties
Arizona-Sonora Desert Museum Tucson, Arizona
Agave (Agaves) 65 taxa
Arnold Arboretum of Harvard University Boston, Massachusetts
Acer (Maples) 133 taxa, 55 species - part of multi-site collection
Carya (Hickories, Pecans) 18 taxa, 11 species
Fagus (Beeches) 26 taxa, 8 species
Stewartia (Stewartias) 11 taxa, 7 species
Syringa (Lilacs) 201 taxa, 22 species
Tsuga (Hemlocks) 59 taxa, 7 species
Atlanta Botanical Garden Atlanta, Georgia
Acer (Maples) 82 taxa - part of multi-site collection
Sarracenia (Pitcher Plants) 78 taxa
Chicago Botanic Garden Glencoe, Illinois
Geranium (Geraniums) 102 taxa including 85 cultivars
Spiraea (Spireas) 52 taxa
Quercus (Oaks) 48 taxa - part of multi-site collection
Cornell Plantations Ithaca, New York
Acer (Maples) 98 taxa - part of multi-site collection
Quercus (Oaks) 77 taxa - part of multi-site collection
Dawes Arboretum Newark, OH
Acer (Maples) 336 taxa - part of multi-site collection
Metasequoia (Dawn-Redwood) 9 taxa, 47 wild-collected accessions and 8 cultivars
Denver Botanic Gardens Denver, Colorado
Quercus (Oaks) 61 taxa - part of multi-site collection
Desert Botanical Garden Phoenix, Arizona
Agavaceae 346 taxa
Cactaceae 1319 taxa
Donald E. Davis Arboretum Auburn, Alabama
Quercus (Oaks) 34 taxa - part of multi-site collection Provisional Status
Fairchild Tropical Botanic Garden Coral Gables, Florida
Arecaceae (Palm Family) 657 taxa
Cycadopsida (Cycads) 150 taxa
Fullerton Arboretum (California State University) Fullerton, California
Citrus (Citrus) 36 accessions, 20 taxa
Ganna Walska Lotusland Santa Barbara, California
Cycadopsida (Cycads) 169 taxa, 3 families, 10 genera
Green Spring Gardens Alexandria, Virginia
Hamamelis (Witch Hazels) 80 taxa, 5 species, 75 cultivars
Henry Foundation for Botanical Research Gladwyne, Pennsylvania
Magnolia (US Native Magnolias) 15 taxa
Highstead Arboretum Redding, Connecticut
Kalmia (Mountain Laurels) 78 taxa, 3 species, 69 cultivars, 4 forms, 2 hybrids
Holden Arboretum Kirtland, Ohio
Quercus (Oaks) 64 taxa - part of multi-site collection
Hoyt Arboretum Portland, Oregon
Acer (Maples) 67 taxa - part of multi-site collection
Huntington Botanical Gardens San Marino, California
Camellia (Camellias) 40 species, 1200 cultivars
JC Raulston Arboretum Raleigh, North Carolina
Cercis (Redbuds) 40 taxa
Jenkins Arboretum Devon, Pennsylvania
Kalmia (Kalmias) 48 taxa, 65 accessions
Rhododendron (Rhododendrons) 1,861 taxa
Landis Arboretum Esperance, New York
Quercus (Oaks) 14 taxa - part of multi-site collection
Matthaei Botanical Gardens & Nichols Arboretum Ann Arbor, Michigan
Paeonia (Peonies, Herbaceous) 292 cultivars Provisional Status
Mendocino Coast Botanical Gardens Fort Bragg, California
Heaths and Heathers Provisional Status
Missouri Botanical Garden St. Louis, Missouri
Quercus (Oaks) 40 taxa - part of multi-site collection
Montgomery Botanical Center Miami, Florida
Arecaceae (Palm Family) 358 taxa
Cycadales (Cycad Order) 222 taxa
Montreal Botanical Garden/Jardin botanique de Montreal Montreal, Quebec, Canada
Rosa (Roses) 1097 taxa
The Morton Arboretum Lisle, Illinois
Acer (Maples) 67 taxa - part of multi-site collection
Malus (Crabapples) 185 taxa
Quercus (Oaks) 67 taxa - part of multi-site collection
Ulmus (Elms) 73 taxa
Morris Arboretum of the University of Pennsylvania Philadelphia, Pennsylvania
Abies (Firs) 35 taxa, including cultivars
Acer (Maples) 82 taxa - part of multi-site collection
Quercus (Oaks) 58 taxa - part of multi-site collection
Mount Auburn Cemetery Cambridge, Massachusetts
Quercus (Oaks) 25 taxa - part of multi-site collection
Mt. Cuba Center Greenville, Delaware
Hexastylis (Wild Gingers) 26 taxa, 68 accessions
Trillium (Trilliums) 71 taxa, 512 accessions
New York Botanical Garden Bronx, New York
Acer (Maples) 114 taxa - part of multi-site collection
Quercus (Oaks) 46 taxa - part of multi-site collection
Norfolk Botanical Garden Norfolk, Virginia
Camellia (Camellias) 525 taxa
Hydrangaceae (Hydrangea Family) 190 taxa
North Carolina Arboretum Asheville, North Carolina
Rhododendron (US Native Deciduous Azaleas) 16 species
Polly Hill Arboretum Martha's Vineyard, Massachusetts
Stewartia (Stewartias) 19 taxa
Quarryhill Botanical Garden Glen Ellen, California
Acer (Maples) 48 taxa - part of multi-site collection
Rancho Santa Ana Botanic Garden Claremont, California
Quercus (Oaks) 27 taxa - part of multi-site collection
Reiman Gardens at Iowa State University Ames, Iowa
Dr. Griffith Buck Roses 74 cultivars Provisional Status
Rhododendron Species Botanical Garden Federal Way, Washington
Rhododendron subsect. fortunea (Rhododendrons) 300 accessions, 24 taxa including 8 cultivars
Rogerson Clematis Collection (Friends of) West Linn, Oregon
Clematis (Clematis) 623 taxa
San Francisco Botanical Garden at Strybing Arboretum San Francisco, California
Mesoamerican Cloud Forest 331 species in 182 genera representing 83 families, primarily from tropical mountains of southern Mexico and Central America
Santa Barbara Botanical Garden Santa Barbara, California
Dudleya (Dudleyas) 52 taxa
Scott Arboretum of Swarthmore College Swarthmore, Pennsylvania
Ilex (Hollies) 312 taxa
Magnolia (Magnolias) 138 taxa
Quercus (Oaks) 52 taxa - part of multi-site collection
Starhill Forest Arboretum Petersburg, Illinois
Quercus (Oaks) 290 taxa - part of multi-site collection
Toledo Botanical Garden Toledo, Ohio
Hosta (Hostas) 2500 accessions, 43 species, 357 cultivars
Tyler Arboretum Media, Pennsylvania
Rhododendron (Rhododendrons) 529 taxa
UC Davis Arboretum Davis, California
Quercus (Oaks) 71 taxa - part of multi-site collection
University of British Columbia Botanical Garden Vancouver, British Columbia, Canada
Acer (Maples) 116 taxa - part of multi-site collection
Univ of California Botanical Garden Berkeley, California
Quercus (Oaks) 71 taxa
US National Arboretum Washington, DC
Buxus (Boxwood) 137 species and cultivars
University of Washington Botanic Gardens Seattle, Washington
Acer (Maples) 209 taxa - part of multi-site collection
Ilex (Hollies) 47 species
Quercus (Oaks) 86 taxa - part of multi-site collection
