Oneida County Aquatic Invasive Species Program
​​​Stephanie Boismenue
AIS Coordinator
Oneida County Land & Water
Conservation Department

​Oneida County Courthouse, 2nd floor
1 S. Oneida Avenue
Rhinelander, WI  54501
Phone: (715) 369-7835
sboismenue@co.oneida.wi.us

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Yellow Floating Heart   Nymphoides peltata

Identification: Yellow floating heart is a rooted, perennial plant. Its floating, heart-shaped leaves are 3-12 cm across and green with slightly wavy margins. The undersides of the leaves are often purple. Yellow floating heart has 2-5 yellow flowers that bloom between May and October. The flowers have 5 fringed petals.

Ecology and Natural History: Yellow floating heart is native to Eastern Asia and the Mediterranean. It was introduced to the United States as a water garden plant. It grows in lakes, ponds, swamps, and channels with slow-moving water. It can tolerate anaerobic conditions.

Impacts of Introduction: Yellow floating heart typically develops monotypic patches that crowd out native plants. The dense patches also create stagnate, low-oxygenated water. The floating mats block sunlight for plants and algae and can impede boating.
It is PROHIBITED to possess, transport, transfer, or introduce yellow floating heart without a permit in the state of Wisconsin.
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Do you think your lake has yellow floating heart? Contact us to schedule a visit to your lake for confirmation.

Stephanie Boismenue, AIS Coordinator
Oneida County Land & Water Conservation Department
1 S. Oneida Avenue
Oneida County Courthouse, (Second Floor)
PO Box 400
​Rhinelander WI 54501

Contact Us:
Phone: (715) 369-7835
Email:  sboismenue@co.oneida.wi.us

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