Links to native plant & related organizations
CALIFORNIA
Other CNPS chapters in California
Angeles National Forest — U.S. Forest Service
California Academy of Sciences Botany Department and their Wildflowers page
California Chaparral Institute
California Invasive Plant Council (Cal-IPC)
California Native Grasslands Association
San Gabriel Mountains Heritage Association
Sierra Club, Angeles Chapter, Natural Science Section
Southern California Wetlands Mapping Project
Wildflowers and Other Plants of Southern California
NORTH AMERICA
Canada (and other parts of North America): North American Native Plant Society
OVERSEAS
Australia: Association of Societies for Growing Australian Plants (ASGAP), Wildflower Society of Western Australia (with links to societies in other states)
New Zealand: Botanical Society of Otago (with links to several other New Zealand societies)
South Africa: Botanical Society of South Africa, Kirstenbosh National Botanic Garden
United Kingdom : Botanical Society of the British Isles, The Wildflower Society, Botanical Society of Scotland
Zimbabwe: Tree Society of Zimbabwe