California Native Plant Society

The California Native Plant Society (CNPS) is a California environmental nonprofit organization (501(c)(3)) that seeks to increase understanding of California's native flora and to preserve it for future generations. The mission of CNPS is to conserve California native plants and their natural habitats, and increase understanding, appreciation, and horticultural use of native plants throughout the entire state and the California Floristic Province.

Source: Wikipedia — California Native Plant Society (CC BY-SA 4.0)