Bolboschoenus robustus

Seacoast bulrush, Seacoast Bulrush

Family: Cyperaceae · Type: perennial · Native

Seacoast bulrush is a California native perennial found in Suisun Marsh, central coast, San Francisco Bay, and southern coastal regions in brackish to saline coastal marshes at sea level. Flowering during summer, this plant produces spikelets with small flowers, typically 10 to 30 millimeters long and 6 to 10 millimeters wide. Growing with robust stems 50 to 150 centimeters tall and 4 to 8 millimeters in diameter, it forms dense clusters in marsh environments. Its leaves have papery, veiny sheaths with blades 4 to 12 millimeters wide, and distinctive orange anthers with three stigmas. The fruit is approximately 3 millimeters long, slightly flattened, and uniquely adapted to float on water surfaces.

Habitat: Local in California. Brackish to saline coastal marshes

Bloom period: Summer

Elevation: +- 0 m.

Bioregions: GV (Suisun Marsh), CCo, SnFrB, SCo

California counties: Orange, Riverside, Sonoma, Napa, Contra Costa, Marin, Solano, San Luis Obispo, Yuba, San Francisco, Humboldt, Mendocino, Ventura, Los Angeles, Santa Barbara, Monterey, Glenn, Kern, Inyo, Alameda, Yolo, San Mateo, Santa Cruz

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