Large-flowered Waterweed

Egeria densa

Elodea densa, the large-flowered waterweed or Brazilian waterweed, is a species of Elodea native to warm temperate South America in southeastern Brazil, Argentina, Chile, and Uruguay. It is considered a problematic invasive species due to its use in home aquariums and subsequent release into non-native ecosystems.

Scientific name
Egeria densa
Family
Hydrocharitaceae