Calflora, a 501c3 non-profit
Distribution by County   7695    
Sparganium emersum  Rehmann  ssp. emersum 

(not an active name)
Emersed bur reed
Sparganium emersum ssp. emersum is a perennial herb that is native to California, and also found elsewhere in western North America.
Record Count by County

Alpine: 1 Inyo: 2 Mono: 4 Sierra: 10
Amador: 1 Lassen: 15 Nevada: 13 Siskiyou: 5
Butte: 3 Madera: 1 Placer: 4 Sonoma: 6
Del Norte: 4 Mariposa: 3 Plumas: 15 Tehama: 2
El Dorado: 1 Mendocino: 14 Santa Cruz: 1 Trinity: 1
Humboldt: 9 Modoc: 12 Shasta: 12 Tulare: 1

Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals, including the Consortium of California Herbaria. [web application]. 2026. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 02/06/2026).