Resource: Professional Societies
- American Botanical Council
- American Bryological and Lichenological Society
- American Fern Society
- American Institute of Biological Sciences
- American Iris Society
- American Public Gardens Association
- American Public Gardens Association
- American Society of Botanical Artists
- American Society of Plant Biologists
- American Society of Plant Physiologists
- American Society of Plant Taxonomists
- Association for the Taxonomic Study of the Flora of Tropical Africa
- Botanical Research Institute of Texas
- Botanical Society of Britain & Ireland
- Botanical Society of Britain and Ireland
- Botanical Society of Canada
- Botanical Society of Scotland
- British Bryological Society
- California Botanical Society
- California Chaparral Institute
- California Native Plant Society
- Ecological Society of America
- International Association for Plant Taxonomy
- International Association for Vegetation Science
- International Association of Bryologists
- International Phycological Society
- New York Botanical Garden
- Phycological Society of America
- Plant Heritage
- Planting Science
- Southern Appalachian Botanical Society
- The Botanical Society of America
- The Society for Economic Botany
- Toronto Botanical Garden
- Torrey Botanical Society
- Washington Native Plant Society
- Weed Science Society of America
- Wild Flower Society