(Myriophyllum aquaticum - synonyms: Myriophyllum brasiliensis, Myriophyllum brasiliense, Myriophyllum proserpinacoides and Enydria aquatica).
"Dwarf parrot feather" and "dwarf red parrot feather" are common names for a dwarf selection sold in trade.
- Spikes of stiff, feathery leaves grow in whorls of 4-6
- Bright green upper stem emerges up to 1 foot above water
- Small, inconspicuous white flowers where leaves attach to the section of stem above water
- Stems and submerged leaves may be tinted reddish
- All U.S. plants are female, spread via fragmentation
Leslie J. Mehrhoff, University of Connecticut, Bugwood.org
Graves Lovell, ADCNR Bugwood.org - Parrot feather invasion
Graves Lovell, ADCNR - Parrot feather up close
Habitat: Occurs in slow-moving fresh water habitats such as tributaries, canals, ponds, and lakes. It shows preference for high nutrient environments with plenty of light.
Native Range: South America
U.S. Distribution: Parrot feather can be found in at least 26 states, including those along the Eastern, Southern, and Western coasts.
Local Concern: This invasive milfoil plant threatens native aquatic species through competition. It will often form dense mats which provides habitat for mosquito larvae and can impede boats.
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.