MDARD Weed Risk Assessment for Parrot Feather (Myriophyllum aquaticum) - This document evaluates the invasive potential of the plant species using information based on establishment, spread and potential to cause harm. Parrots Feather - Myriophyllum aquaticum Identification, Management Control and Removal. Parrot feather is related to Eurasian Water Milfoil (Myriophyllum spicatum) -- an aggressive aquatic invasive that is all too familiar to Michigan lake enthusiasts. Background Species Name: Parrot feather (Myriophyllumaquaticum) Description: This aquatic invasive species has both submersed (below water) and emergent (above water) leaves, with stems growing as tall as a foot above water level. Parrot feather was frequently cultivated in ornamental purposes in aquatic gardens and aquariums in the past, before people became aware of the invasive nature of this plant. Leaves are arranged in circles (whorls) of 4 – 6 leaves, and are grey-green and feathery. In large numbers, the plants make a dense mat on the water's surface, shading the water from sunlight and causing native plants … parrot feather watermilfoil This plant can be weedy or invasive according to the authoritative sources noted below.This plant may be known by one or more common names in different places, and some are listed above. Distribution and Habitat Male and female flower parts occur on separate plants, and male plants are only known to occur in the plants native range. Cal-IPC Publication 2006-02 (1 February 2007). It’s easy to see why this emersed aquatic plant is called parrot feather. 2006). PARTIAL eradication, containment/exclusion and suppression) to determine whether control is feasible … Range: Parrot feather is native to South America, and is considered invasive in the United States. The leaves above the … It prefers good light, slightly alkaline and high-nutrient environments. It was introduced to North America around 1890 as an aquarium and aquatic garden plant. It earned its moniker from its dense plumes of fine-texture foliage. Parrotfeather has bright green, stiff, fir-tree-like foliage that can extend up to 1 foot above the water, and resemble very small fir trees. Parrot´s Feather Invasive Species. Parrot Feather. It is a popular plant in aquatic gardens. M. aquaticum has both submerged and ... undertake this for all the high risk invasive aquatic plant species identified in the Invasive Species Ireland risk assessment. University of Wisconsin Press. ... aquaticum as a “most significant invasive plant” and the latter assessment designed the plant as a ‘high risk’ invasive species for Ireland. Parrot feather is a dioecious species, however only pistillate (female) plants are found outside of South America. Data Source. Description. It can also invade muddy banks. Since this plant does not colonize terrestrial sites it is safe to compost in a contained area. It mpacts waterways, irrigation ditches, and drainage canals, where it has the potential to inhibit flow and increase maintenance costs. Tiny white flowers grow in the leaf axils of emergent stems. Tiny white flowers grow in the leaf axils of emergent stems. It is now found in fresh waters throughout the state. Stems are stout and blue-green in color. Parrot feather is an invasive aquatic plant that it is now present in nearly every southern state. This plant has pinkish-white flowers. Plants have spread into the wild from garden ponds by vegetative propagation as it does not produce seed in the UK. The plant can be introduced to new areas when sections of its rhizome are dug up and moved. Aquatic herbicides are sometimes effective in parrot feather plant care and control. Draining a pond in the summer achieved control in one instance, but draining may not achieve control in winter. Parrot Feather Author: City of Portland Bureau of Environmental Services Subject: Also known as Brazilian watermilfoil and parrot feather watermilfoil Keywords: parrot feather,invasive plant profiles,invasive weeds Created Date: 4/18/2007 3:55:02 PM Parrot feather is native to South America . Commonly sold for aquaria and aquatic gardens, it has escaped to become invasive in ponds and other calm water bodies in this region. M. aquaticum (parrot-feather) is an invasive submerged/ emergent aquatic weed characteristic of sub-tropical to warm-temperate regions, but found as far north as the UK (recorded from at least 33 countries: native to perhaps 6 of these, all in South America). Also make note of the location, date and time of the observation. Often found in retail centers under the wrong name, parrot feather is a popular water gardening and aquarium plant with deeply cut, bright blue-green, feathery leaflets. Parrot’s Feather information . 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