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 CNPS California Oak Watch project focuses on collecting valuable data about oaks native to the California Floristic Province. To protect them, we need to know where they are, and with the help of people in our community, we can map them!
The U.S. Bureau of Land Management has banned new mining for 50 years on 2,841 acres in the San Bernardino National Forest to protect critical habitat for four threatened and endangered plant species.
The Inyo rock daisy is a rare wildflower found only at the highest elevations of the southern Inyo Mountains. It lives on ancient carbonate bedrock on Conglomerate Mesa, which is threatened by gold mining.