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Myriophyllum aquaticum

Plant Description

An aquatic floating plant that forms dense mats with stems up to 16 feet long. Between May and October spikes of feathery leaves, like bottle brushes or tiny pine trees, emerge up to one foot above the water.

Plant Details

Life Forms
Suggested Actions
Mature Height up to 16 feet long
Distribution Found in waterways throughout western Oregon and Washington and in at least 24 other US states.
Control While difficult to eradicate, parrotfeather can be pulled or raked, being careful to completely remove all fragments. Herbicide can only be applied by a licensed aquatic herbicide applicator.
Disposal Methods Be sure to remove all fragments.
Reproduction and Spread Spreads by fragmentation.
Introduced Native to South America, Parrotfeather was introduced to the US around 1890 through the aquatic garden and aquarium trade.
Look Alikes Other milfoils look similar underwater, but only parrotfeather has the distinct feathery, emergent bottle brush whorls.
Impact Clogs waterways, ponds, and ditches. Eliminates native plants, aquatic habitat, and recreation. Reduces agricultural profitability.
More Info
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