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American Begonia Society
<http://www.begonias.org>
American Botanical Council
<http://www.herbalgram.org>
The American Fern Society
<http://amerfernsoc.org>
American Hibiscus Society
<http://americanhibiscus.org>
The American Primrose Society
<http://www.americanprimrosesociety.org>
American Rose Society
<http://www.ars.org>
Bartram's Garden
<http://www.bartramsgarden.org>
Botanical Research Institute of Texas
<http://www.brit.org>
Brooklyn Botanic Garden
<http://www.bbg.org>
California Native Plant Society
<http://www.cnps.org/index.htm>
Chanticleer Garden
<http://www.chanticleergarden.org>
Cleveland Botanical Garden
<http://www.cbgarden.org>
Daniel Stowe Botanical Garden
<http://www.stowegarden.org>
Dow Gardens
<http://www.dowgardens.org>
Fairchild Tropical Garden
<http://www.ftg.org>
Filoli
<http://filoli.org>
Gainesville Camellia Society
<http://www.afn.org/~camellia>
Georgia Botanical Society
<http://www.gabotsoc.org>
Grand Prairie Friends
<http://www.prairienet.org/gpf>
IPMnet
<http://www.IPMnet.org>
Longwood Gardens
<http://www.longwoodgardens.org>
Minnesota State Horticultural Society
<http://www.northerngardener.org>
Missouri Botanical Garden
<http://www.mobot.org>
National Gardening Association
<http://www.wowpages.com/nga/home.html>
The New England Botanical Club
<http://www.huh.harvard.edu/nebc>
The North American Rock Garden Society
<http://www.nargs.org>
Pennsylvania Horticultural Society
<http://www.pennsylvaniahorticulturalsociety.org>
San Antonio Botanical Gardens
<http://www.sabot.org>
San Diego Fern Society
<http://www.sdfern.com>
Society for Economic Botany
<http://www.econbot.org>
Tucson Botanical Gardens
<http://www.tucsonbotanical.org> | 
