Bolboschoenus glaucus

Tubered bulrush

Family: Cyperaceae · Type: perennial · Not Native

Tubered bulrush is a naturalized perennial found in the Great Valley, Central Coast, San Francisco Bay, and Southern California regions in fresh to brackish marshes, shores, and wildlife refuges at elevations below 800 meters. Flowering during summer, this plant produces yellow-anthered flowers in dense clusters of 3 to 30 spikelets 10 to 40 millimeters long. Growing to 150 centimeters tall with stems 1.5 to 3 millimeters in diameter, it forms dense stands in wetland habitats. Its leaves have sheath tips with acutely triangular membranous areas and blades 2 to 6 millimeters wide. The fruit is small and uniquely adapted to aquatic environments, sinking when submerged and measuring 2.5 to 3.3 millimeters long.

Habitat: In dense stands locally. Fresh to brackish marshes, shores, wildlife refuges, rice-fields

Bloom period: Summer

Elevation: < 800 m

Bioregions: GV, CCo, SnFrB, SCo

California counties: Colusa, San Luis Obispo, Riverside, Butte, Solano, Kern, Merced, Glenn, Sonoma, Yolo, Tehama, San Diego, Marin, Contra Costa, Napa, Alameda

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