Deinandra fasciculata

Clustered tarweed

Family: Asteraceae · Type: annual · Native

Clustered tarweed is a California native annual found in southern Central Coast, western South Coast Ranges, and southwestern California in open or disturbed sites, grasslands, scrub, woodland, and vernal pools at elevations below 1,200 meters. Flowering from April to September, this plant produces deep yellow ray flowers 6 to 14 millimeters long with distinctive red to dark purple disk anthers. Growing 40 to 100 centimeters tall with stems that are coarse-hairy, it forms tight groups or pairs of flower heads in raceme-like clusters. Its proximal leaves are toothed and somewhat coarse-hairy, creating a textured appearance across the plant's structure. The flower heads feature 5 ray flowers and unique paleae arranged in a single series, with bracts that overlap at least half of the involucre.

Habitat: Open or disturbed sites, grassland, scrub, woodland, vernal pools, sometimes on serpentine

Bloom period: Apr-Sep

Elevation: < 1200 m

Bioregions: s CCo, w SCoRO, SW

California counties: San Diego, Ventura, Los Angeles, Orange, Riverside, San Bernardino, Santa Barbara, San Luis Obispo, Monterey, San Francisco, Merced, Alameda

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