California Native Plant Society

Rare Plant Data

Calochortus tiburonensis (photo by York 1986)
Calochortus tiburonensis (photo by York 1986)

The CNPS Inventory of Rare and Endangered Plants of California (the CNPS Inventory) is based on the best available information on rare plant distribution and endangerment. In order to keep this information up-to-date, we rely on contributions from botanists (both amateur and professional) throughout California.

All information we receive is shared with the California Natural Diversity Database (CNDDB) of the California Department of Fish and Game (DFG). The CNDDB is the largest, most comprehensive database of its type in the world. It presently contains more than 65,000 site-specific records on California's rarest plants, animals and natural communities.

The backbone of both the CNDDB and CNPS effort is the Field Survey Form. This form is used to record field observations of rare, threatened, endangered or sensitive species ("elements").

Field Survey Form

Native Species Field Survey Form and other relevant information - links to the DFG’s Biogeographic Data Branch website. Click on the PDF document “California Native Species Field Survey Form” in order to fill out a form. This website also contains information on how to fill out the Field Survey Form.

If you have any questions about submitting information, please contact CNPS Rare Plant Botanist Aaron Sims at asimscnps.org or 916/324-3816.

Monitoring/Rediscovery Efforts

Astragalus lentiginosus var. kernensis (photo by J. Shevock)
Astragalus lentiginosus var. kernensis (photo by J. Shevock)

The CNPS Inventory and the CNDDB are only as good as the data received. For this reason, CNPS encourages the surveying and monitoring of rare plant taxa, especially for those plants that have localities which have not been surveyed for more than 20 years. The hope is that information can be gathered about the status of these populations so that the information present in the CNPS Inventory and the CNDDB on rare plant species is as accurate, complete and up-to-date as possible.

For more information about surveying and monitoring of rare plant taxa in your area, please contact CNPS Rare Plant Botanist Aaron Sims at asimscnps.org or 916/324-3816.

 

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