Atlanta Botanical Garden, Atlanta, Georgia- http://www.atlantabotanicalgarden.org/ 

Bayard Cutting Arboretum, 440 Montauk Highway

Great River, NY 11739- http://www.bayardcuttingarboretum.com/

Biltmore Estate, 1 Approach Road, Asheville, N.C. 28803-

http://www.biltmore.com/

Brooklyn Botanic Garden, Brooklyn, NY- http://bbg.org/

Chicago Botanic Garden, Glencoe, IL - http://www.chicagobotanic.org/  

Cornell Plantations, Ithaca, New York- http://www.plantations.cornell.edu/collections/botanical/winter.cfm

Duke Gardens, Somerville, New Jersey-  http://www.njskylands.com/atdukgar.htm 

Hofstra Arboretum, Hempstead Turnpike, Hempstead, NY - http://www.hofstra.edu/COM/Arbor/arbor_flower_about.cfm   

Lewis Ginter Botanical Garden, Richmond, Virginia- http://www.lewisginter.org/

Longwood Gardens, Kennett Square, PA- http://www.longwoodgardens.org/

Missouri Botanic garden, St.Louis, Missouri- http://www.mobot.org/

Mount Auburn Cemetery, Cambridge, MA- http://www.mountauburn.org/

The Morton Arboretum, 4100 Illinois Route 53, Lisle, Illinois, 60532-1293- http:// www.mortonarb.org

New York Botanical Garden- http://nybg.org/

Old Westbury Gardens, Old Westbury, NY- http://www.oldwestburygardens.org/

Phipps Conservatory and Botanical Gardens, Pittsburg, Pennsylvania- http://www.phipps.conservatory.org/

Planting Fields Arboretum State Historic Park, Oyster bay, New York www.plantingfields.org

The Scott Arboretum at Swarthmore College, Swarthmore, Pennsylvania- http://www.scottarboretum.org

The Botanical Garden of Smith College, Northampton, Massachusetts-  http://www.smith.edu/garden/home.html   

The United States Botanical Garden, Washington D.C.- http://www.usbg.gov/  

Winterthur Museum and Gardens, Route 52

Winterthur, DE 19735- http://www.winterthur.org/ 

The Arnold Arboretum of Harvard University

125 Arborway

Jamaica Plain, MA 02130-3500

http://www.arboretum.harvard.edu/