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American Conifer Society - http://www.conifersociety.org/
Association for the development, conservation, and propagation of conifers, with an emphasis on those that are dwarf or unusual. Photo gallery, database, information about membership and journal. |
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Magnolia Society International - http://www.magnoliasociety.org/
A worldwide organization of gardeners, nurserymen and other people who are devoted to the appreciation and study of magnolias. |
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American Association of Amateur Arborists - http://www.geocities.com/Athens/Academy/4901/
A loose association of individuals and groups interested in learning more about trees and other woody plants. |
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British Conifer Society - http://www.britishconifersociety.org.uk/
Organization for gardeners and collectors of ornamental, dwarf and rare conifers, owners and managers of arboreta and nurseries, and professional botanists. Photo gallery and database, excerpts from the journal. |