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.
Threatened by mining, California's tiny and rare Inyo rock daisy is in danger of losing its entire range.
We looked for rare plants, camped, hiked, went birdwatching, and found fire followers coming up in the French Fire burn area.
Named for its distinctive fruits, the rare finger rush grows in vernally moist microhabitats and stands only a few centimeters tall.