Collomia diversifolia

Serpentine collomia

Family: Polemoniaceae · Type: annual · Native

Conservation status: CNPS 4.3

Serpentine collomia is a rare (CNPS 4.3) California native annual found in northern coastal regions including Contra Costa County, growing in rocky to gravelly serpentine areas at elevations of 60 to 900 meters. Flowering from April to July, this plant produces violet-pink flowers with a purple tube and yellow throat, approximately 9 to 12 millimeters long. Growing with erect stems 15 to 45 centimeters tall, the plant branches into several subequal stems covered with long translucent glandular hairs. Its lower leaves are three-toothed while upper leaves are entire, glandular-puberulent, and arranged along the stem. The plant produces two to three seeds per chamber, with white pollen adding to its distinctive characteristics.

Habitat: Rocky to gravelly serpentine areas

Bloom period: Apr-Jul

Elevation: 60-900 m

Bioregions: NCoRH, NCoRI, ne SnFrB (Contra Costa Co.).

California counties: Lake, Napa, Tehama, Marin, Siskiyou, Sonoma, Colusa, Mendocino, Sierra, Trinity, Glenn, Contra Costa, Stanislaus, Shasta, San Joaquin, Fresno

Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Jepson eFlora, Cal-IPC, and more.