The links on this page are to non-commercial organisations which provide information and pictures about clematis or related subjects:

The International Clematis Society

The American Clematis Society

The Finnish Clematis Club
(Kärhökerho Klematisklubben)

The Swedish Clematis Society
(Svenska Clematis Sällskapet)

Clematis on the Web
(The University of Hull, UK)

The NCCPG
(The National Council for the Conservation of Plants and Gardens)

The Royal Horticultural Society

The Historic Roses Group

The International Directory of Botany