Calflora, a 501c3 non-profit
Distribution by County   4358    
Iris pseudacorus  L.
Horticultural iris, Paleyellow iris, Yellowflag iris, Water iris
Iris pseudacorus is a perennial herb that is not native to California.
Cal-IPC rating: limited
Record Count by County

Alameda: 7 Marin: 127 Riverside: 4 Santa Clara: 18
Butte: 21 Mariposa: 1 Sacramento: 61 Santa Cruz: 2
Contra Costa: 22 Mendocino: 11 San Benito: 2 Shasta: 22
Del Norte: 2 Merced: 12 San Bernardino: 11 Siskiyou: 9
El Dorado: 6 Monterey: 15 San Diego: 35 Solano: 14
Glenn: 1 Napa: 4 San Francisco: 3 Sonoma: 21
Humboldt: 19 Nevada: 6 San Joaquin: 18 Tuolumne: 2
Kern: 4 Orange: 65 San Luis Obispo: 10 Ventura: 4
Los Angeles: 26 Placer: 5 San Mateo: 18 Yolo: 6
Madera: 6 Plumas: 1 Santa Barbara: 8

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: 05/19/2026).