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Cabomba caroliniana

LHPrism Status 
Tier 2 - Emerging
Lake or Pond
Key Characteristics 
Cup-like flowers grow above the water and are visible from May- September. The flower is less than 2 cm across and ranges in color from white to pale yellow. The flower emerges on stalks from the tips of the stems.
Individual leaves have thin vein-like structures in a half-moon shape. Underwater leaves are divided into fine branches, resulting in a feathery fan-like appearance. Leaves are about 5 cm across. There are also a few small, floating, linear-elliptic leaves with entire margins and a basal notch. They are 6-20 mm long.
Fanwort is a submerged aquatic perennial plant and can grow 7 ft or higher.
Impacts of this species 

Fanwort can form dense populations that interfere with recreation and clog drainage systems. It can grow from plant fragments, making it easier to spread.


Fanwort is native to North America but invasive in New England. It is sold as an aquarium plant and is often introduced from aquarium dumping.

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