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Taxon  Report  
Ludwigia hexapetala  (Hook. & Arn.) Zardini, H. Gu, & P. H. Raven
Ludwigia,   Six petal water primrose
Ludwigia hexapetala is a perennial herb that is not native to California.
Cal-IPC rating: high
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Observation Search
(468 records)
redone or more occurrences
within a 7.5-minute quadrangle

Bloom Period
Genus: Ludwigia
Family: Onagraceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Communities: Freshwater Wetlands, wetland-riparian
Name Status:
Accepted by JEF

Alternate Names:
JEFJussiaea uruguayensis
Information about  Ludwigia hexapetala from other sources

[Cal-IPC] Invasiveness: Ludwigia hexapetala (Uruguay water-primrose) is an aquatic plant (family Onagraceae) that forms dense mats in waterways, reaching above and below the water surface. This dense growth impedes water movement, blocks the growth of native plants, and reduces available habitat for waterbirds and fish. Although this species has been naturalized in California for at least 25 years, it has grown exponentially in the past several years, leading to increased concern over its impacts on waterways. Pieces of Uruguay water-primrose mats can catch on boat and other watercraft that then spread plants to new areas. Cal-IPC Rating: High (contributed by Mary Ann Machi)

[Wikipedia] Central & South America native: Ludwigia hexapetala, the water primrose, is a herbaceous perennial plant of the family Onagraceae. Native to Central and South America, its habitat includes the margins of lakes, ponds, ditches, and streams. Its stems may be immersed or fully emergent. It is a noxious invader of aquatic ecosystems in North America. (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]. 2023. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 12/06/2023).