- Heliconia Society of Puerto Rico - Offers photo gallery and online newsletter.
- Native Orchid Conservation Inc. - NOCI is a non-profit group dedicated to habitat protection, study and appreciation of native plants and their ecosystems.
- 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.
- Plantlife: The Wild-Plant Conservation Charity - A membership organisation solely dedicated to saving wild plants and their habitats.
- 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.
