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Class B Noxious Weed

Yellow Floating Heart
Nymphoides peltata
 

Photo coming soon!


Plant family: Menyanthaceae
Year listed: 2000
Native to: Eurasia

Why is it a noxious weed?

Yellow floating heart,  a popular garden ornamental that appears to be an aggressive grower with the capability to establish in natural areas. Fish and wildlife habitat, recreation and water quality is negatively impacted when the dense mats of yellow floating heart outcompete native and beneficial plant species. Fish, swimmers and canoes cannot pass through these mats.

How would I identify it?
General Description: Aquatic, bottom-rooted perennial with long branched stolons extending up to one meter or more and lie just beneath the waters surface. The node on the stolons typically produces a plant and many thread-like roots.

Leaves:

  • heart shaped
  • frequently purplish underneath, slightly wavy, shallowly scalloped margins

Flowers:

  • bright yellow
  • 5 petals
  • 3-4 cm in diameter
  • found above water on long stalks
  • flower edges are fringed

Stems:

How does it reproduce?
Yellow floating heart spreads by seeds and vegetatively.

Where does it grow?
Yellow floating heart is found in slow moving rivers, lakes, reservoirs, ponds and swamps. It can also grow on damp mud.

What is the distribution in Washington State?
 

 

  • Distribution map not available at this time.

How do I control it?

General control methods: There is no direct control information available for Washington state. However, New Zealand information suggests that hand clearing is possible with small infestations and herbicides
need to be used for larger infestations.

Cultural: Information not available at this time.

Herbicide: Because herbicide availability and regulation differ between States, as well as between countries, we recommend the Washington Department of Ecology web site for information on aquatic weed management and herbicides.

Mechanical: Information not available at this time.

Biological: Information not available at this time.

Are there plants that may be confused with Yellow floating heart?
Spatterdock sometimes is mistaken for Yellow floating heart. Spatterdock is a native plant to Washington. If you need help with plant identification, please contact your county weed coordinator

 

For more information
For more information, download our Written Findings.

 

More Photos-Coming Soon!
           
           

 Last updated July 02, 2008