The Gesneriad Society
- Offers complete culture information, membership benefits, resources, photos, flower show/sales schedules. Location: United States.
- http://www.gesneriadsociety.org/

Gesneriasts of Sweden
- Non-profit association. Includes a photo gallery displaying the variety of genuses and species, flower of the season, and information about membership and the seed bank. English, Swedish and Dutch.
- http://www.gesneriasterna.se/

The British & European Geranium Society
- Learn about the Geranium/Pelargonium family of plants.
- http://www.begs.org.uk

The Bromeliad Society International
- Promoting public and scientific interest in the research, development, preservation and distribution of bromeliads, both natural and hybrid, throughout the world.
- http://www.bsi.org/