International Clematis Society
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Formed in 1984 to improve the cultivation of, disseminate knowledge of, and stimulate scientific research of Clematis. International Registration Authority. Publishes Clematis International. Associated with the Royal Horticultural Society.
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American Clematis Society
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A society of Clematis enthusiasts, founded in 1996. Encourages the development and improvement of Clematis and the collecting, recording and sharing of information concerning Clematis.
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British Clematis Society
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Promotes cultivation and preservation of Clematis. Has an active seed exchange. Publishes The Clematis.
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