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Promotes research and teaching in all fields of plant biology.
http://www.botany.org/
Dedicated to the botany of California and surrounding regions.
http://www.calbotsoc.org/
Independent body representing leading plant science research institutes from Europe.
http://www.epsoweb.org/
A group of professional seed analysts, associates, and students who work in seed laboratories or have an interest in seed testing.
http://www.frsa.org/
Membership organization for aroid enthusiasts.
http://www.aroid.org/
Scholarly organization of researchers from academia and industry.
http://www.iasprr.org/