Castilleja affinis subsp. neglecta

Tiburon paintbrush, Tiburon Paintbrush

Family: Orobanchaceae · Type: perennial · Native

Conservation status: CNPS 1B.2 · Endangered

Tiburon paintbrush is a rare (CNPS 1B.2) California native perennial found in southern North Coast Ranges Interior and San Francisco Bay Area regions, specifically in Napa, Marin, and Santa Clara counties, growing on open serpentine slopes at elevations below 300 meters. Flowering from April to June, this plant produces yellow, pink, or red-orange flowers in inflorescences 15 to 25 millimeters wide. Growing with bristly stems up to 40 centimeters tall, it develops a distinctive appearance with its variable plant structure. Its leaves are approximately 20 to 40 millimeters long, lanceolate in shape, with 0 to 5 potential lobes, giving the plant a delicate yet textured profile. The flower's calyx measures 15 to 20 millimeters, with a corolla 18 to 22 millimeters long, creating an intricate and colorful display.

Habitat: Open serpentine slopes

Bloom period: Apr-Jun

Elevation: < 300 m

Bioregions: s NCoRI (Napa Co.), SnFrB (Marin, Santa Clara cos.).

California counties: Marin, Napa, Santa Clara

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