Native Orchid Conservation Inc.
- NOCI is a non-profit group dedicated to habitat protection, study and appreciation of native plants and their ecosystems.
- http://www.nativeorchid.org

Useful Wild Plants
- Project coordinated around Austin, Texas, to document plants native to the Southern United States and Northern Mexico in a multi-volume encyclopedia. Information about activities and volunteering.
- http://www.usefulwildplants.org/

Heliconia Society of Puerto Rico
- Offers photo gallery and online newsletter.
- http://www.heliconiasocietypr.org

North American Native Plant Society
- Dedicated to the study, conservation, cultivation and restoration of native plants. Join us in our celebration of the unique botanical heritage of North America.
- http://www.nanps.org

Plantlife: The Wild-Plant Conservation Charity
- A membership organisation solely dedicated to saving wild plants and their habitats.
- http://www.plantlife.org.uk/