SafePlants

Carolina Fanwort (Cabomba caroliniana)

Carolina Fanwort, scientifically known as Cabomba caroliniana, is also commonly referred to as Green Cabomba, Carolina water-shield, fanwort, fish grass, gray fanwort, green grass, chrysanthemum, and purple cabomba. It's known as one of the older favorite aquarium plants.

Considerations for Pets

• Fanwort stems become brittle in late summer, which causes the plant to break. If in aquariums, be mindful of the plant breaking apart.

Taxonomy and Nomenclature

• Scientific Name: Cabomba caroliniana A. Gray
• Family: Cabombaceae (Water-shield family)
• Genus: Cabomba Aubl.
• Species: Cabomba caroliniana A. Gray
• Synonyms: Green Cabomba
• Taxonomic Rank: Species

Distribution and Habitat

• Native to North and South America, specifically the southeastern United States.
• Introduced to New England and elsewhere, including Great Britain, Michigan, Pennsylvania, Washington State and Ontario Canada.
• Grows rooted in the mud of stagnant to slow-flowing water.

Ecological Role

• Considered an invasive species in several regions, including Pennsylvania, Washington State and Ontario Canada.
• Can grow densely, crowding out other aquatic plants, even in its native range.

Morphological Characteristics

• Perennial, submerged, rooted aquatic plant.
• Stems become brittle in late summer.
• Fully submerged except for occasional flowers.
• Has feathery green leaves divided into narrow segments, creating "fans."
• Has short, fragile rhizomes.

Quirky Facts

• Carolina Fanwort is a popular choice amongst beginning hobbyists for home aquariums.

Interactions with Other Organisms

• Can negatively impact native aquatic plants by crowding them out.

Further Information

• USDA PLANTS Database (USDA PLANTS Symbol: CACA)
• Invasive Plant Atlas
• Discover Life
• Non-native Invasive Freshwater Plants, Washington State
• University of North Carolina Press, Chapel Hill