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Taxon  Report  
Egeria densa  Planch.
Brazilian water weed,   Brazilian waterweed
Egeria densa is a perennial herb that is not native to California.
Cal-IPC rating: high
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Observation Search
~199 records in California
redone or more occurrences
within a 7.5-minute quadrangle

Bloom Period
Genus: Egeria
Family: Hydrocharitaceae  
Category: angiosperm  
PLANTS group:Monocot
Jepson eFlora section: monocot

Wetlands: Occurs in wetlands

Communities: wetland-riparian

Name Status:
Accepted by JEF + PLANTS

Alternate Names:
PLANTSAnacharis densa
JEF + PLANTSElodea densa
PLANTSPhilotria densa
Information about  Egeria densa from other sources

[www.tsusinvasives.org] Ecological threat: In smaller populations this plant can provide habitats for many invertebrates, and food for ducks and fish, but when this plant grows to large populations severe ecological changes occur. This aggressive plant is able to successfully invade new aquatic environments and outcompete native vegetation. It forms dense mats which limits sunlight below the surface, reducing oxygen, and killing fish and invertebrates below. As with other invasive aquatic plants, Egeria densa is able to impede water flow which increases flooding risks, and hinder recreational activities. These plant is spread by flooding, waterfowl, and human recreational activities. (contributed by Mary Ann Machi)

[Wikipedia] South America native, invasiveness: Egeria densa, the large-flowered waterweed[1] or Brazilian waterweed, is a species of Egeria native to warm temperate South America in southeastern Brazil, Argentina, Chile and Uruguay.[2][3] It is considered a problematic invasive species due to its use in home aquariums and subsequent release into non-native ecosystems. (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: 04/22/2024).