logo Calflora, a 501c3 non-profit
Taxon  Report  
Eichhornia crassipes  (Mart.) Solms
Common water hyacinth
Eichhornia crassipes is a perennial herb that is not native to California.
Cal-IPC rating: high
Siskiyou Del Norte Modoc Humboldt Shasta Lassen Trinity Plumas Tehama Butte Mendocino Glenn Sierra Yuba Lake Nevada Colusa Placer Sutter El Dorado Yolo Alpine Napa Sonoma Sacramento Mono Amador Solano Calaveras Tuolumne San Joaquin Marin Contra Costa Alameda Santa Cruz Mariposa Madera San Francisco San Mateo Merced Fresno Stanislaus Santa Clara Inyo San Benito Tulare Kings Monterey San Bernardino San Luis Obispo Kern Santa Barbara Ventura Los Angeles Riverside Orange San Diego Imperial
Observation Search
~12952 records in California
redone or more occurrences
within a 7.5-minute quadrangle

Bloom Period
Genus: Eichhornia
Family: Pontederiaceae  
Category: angiosperm  
PLANTS group:Monocot
Jepson eFlora section: monocot

Wetlands: Occurs in wetlands

Communities: wetland-riparian

Name Status:
Accepted by JEF + PLANTS

Alternate Names:
PLANTSEichhornia speciosa
PLANTSPiaropus crassipes
iNatPontederia crassipes
Information about  Eichhornia crassipes from other sources

[Wikipedia] South America native: Pontederia crassipes (formerly Eichhornia crassipes), commonly known as common water hyacinth is an aquatic plant native to South America, naturalized throughout the world, and often invasive outside its native range. It is the sole species of the subgenus Oshunae within the genus Pontederia.Anecdotally, it is known as the "terror of Bengal" due to its invasive growth tendencies. (contributed by Mary Ann Machi)

[Cal-IPC] Invasiveness: Eichhornia crassipes (water hyacinth) is a floating freshwater perennial (family Pontederiaceae) that jams rivers and lakes with tons of floating plant matter. Floating mats of this plant can weigh up to 200 tons per acre. In California, Eichhornia crassipes typically is found below 660 feet (200 m) elevation in the Central Valley, San Francisco Bay Area, and south coast. Cal-IPC Rating: High (contributed by Mary Ann Machi)

Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals. [web application]. 2024. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 05/24/2024).