Since its inception in 1968, the CNPS Rare Plant Program has been a trusted resource for scientific accuracy and integrity. CNPS rare plant data are widely accepted as the standard for information on the rarity and endangerment status of the California flora. Today, we’re using these data to fight extinction, engage citizen scientists, and inform land use decisions statewide. Support CNPS plant science today!
Areas of Focus
Get details on the CNPS ranking categories and how plants are assigned each rank.
These species are critical to the preservation of regional genetic diversity. Here’s what you should know.
The settlement supports mitigation objectives and project improvements to protect the world’s largest population of the federally- and state-endangered Gaviota tarplant
Richard Ke’aumoana Chung is creating a legacy of California plant biodiversity.
The Strauss Wind Energy Project violates both the California Environmental Quality Act (CEQA) and California Fish and Game Code.