Phacelia nashiana is an annual herb that is native to California, and endemic (limited) to California.
California Rare Plant Rank: 1B.2 (rare, threatened, or endangered in CA and elsewhere).
[Wikipedia] Range, Habitat: Phacelia nashiana is a species of phacelia known by the common name Charlotte's phacelia. It is endemic to California, where it is known only from the ecotone where the lower Sierra Nevada and Tehachapi Mountains transition into the Mojave Desert. It grows in scrub and woodland and on granite mountain slopes. (link added by Mary Ann Machi)
Calflora:
Information on California plants for education, research and conservation,
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[web application]. 2025.The Calflora Database
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https://www.calflora.org/(Accessed: 04/03/2025).