• Alabama Nurserymen's Association
  http://www.alna.org
• American Association of Botanical Gardens and Arboreta AABGA, homepage:
  http://www.mobot.org/
• American Nursery and Landscape Association
  http://www.anla.org
• American Orchid Society
  http://orchidweb.org
• American Society for Horticultural Science
  www.ashs.org
• American Society of Landscape Architects
  http://www.asla.org
• Arizona Nursery Association
  http://www.azna.org/
• Associated Landscape Contractors of America
  http://www.alca.org
• California Association of Nurseries and Garden Centers
  http://www.cangc.org
• Eastern Region International Plant Propagators' Society
  e-mail: mbippser@neca.com
• Florida Nursery and Greenhouse Association
  http://www.fngla.org/
• Horticulture Research Institute
  http://www.anla.org/research/index.htm
• International Herb Association
  http://www.herb-pros.com or ihaoffice@aol.com
• International Plant Propagator Society (IPPS)
  http://www.ipps.org/
  Email: DLeeMorgan@MSN.com
• International Society for Arboriculture
  http://www.ag.uiuc.edu/~isa
• Louisiana Nursery Association-See Louisiana Select Plants
  Contact: Alan Owings aowings@agcrt.lsu.edu
• The Magnolia Society
  http://www.tallahassee.net/~magnolia/
• National Arborists Association
  http://www.natlarb.com/index.aspx
• National Christmas Tree Association
  http://www.christree.org
• New England Nursery Association
  http://www.nensyassn.org/
• North Carolina Association of Nurserymen
  http://www.ncan.com
• Ohio Nursery and Landscape Association
  http://www.onla.org/
• Pennsylvania Landscape and Nursery Association
  http://www.plna.com
• Perennial Plant Association
  http://www.perennialplant.org
• Southern Region International Plant Propagators'
  http://www.ipps.org/SouthernNA
• South Carolina Nursery and landscape Association
  http://www.scnla.com/
• Southern Region American Society for Horticultural Science
  http://www.srashs.org/
• Southern Nursery Association
  http://www.sna.org
• Tennessee Nursery Association
  http://www.tnla.com
• Middle Tennessee Nursery Association
  http://www.mtna.com
• Texas Association of Nurserymen
  http://www.growzone.com/tan/
• Virginia Landscape and Nursery Association
  http://vnla.org/

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