Carolina Fanwort


(Cabomba caroliniana)
*Detected in Michigan*

Report this species:

Use the Midwest Invasive Species Information Network (MISIN) online reporting tool 

- Or - download the MISIN smartphone app and report from your phone -



  • Submerged aquatic plant, rooted in the mud of stagnant or slow-flowing water
  • Underwater leaves approximately 2 inches across and divided into fine branches
  • Flowering branches grow above the water surface with diamond shaped leaves
  • Flowers small and range from white to pale yellow
  • Stem length usually less than 10 feet, but can reach 33 feet

Leslie J Mehrhoff University of Connecticut

Robert Videki Doronicum Kft

Leslie J Mehrhoff University of Connecticut

Habitat: This submerged aquatic plant roots itself into the mud of shallow, slow moving or stagnant freshwater ecosystems.

Native Range: Southern Brazil, Uruguay, Paraguay, Argentina, and the southeastern United States

Local Concern: Dense mats alter oxygen and pH levels, reduce sunlight penetration, and interfere with recreational water use.

Means of Introduction: Aquarium and water garden trades, recreational equipment

Other Names: Fanwort, fish grass, green cabomba, Carolina water-shield, Washington-plant, Washington grass


Carolina Fanwort Invasive Species Alert - Printable PDF

Status and Strategy for Carolina Fanwort Management This document provides in-depth information about Carolina Fanwort in the State of Michigan including identification, distribution, management, and control options.

MDARD Weed Risk Assessment for Carolina Fanwort (Cabomba caroliniana) - This document evaluates the invasive potential of the plant species using information based on establishment, spread and potential to cause harm.