BugwoodWiki Article

parrotfeather
Myriophyllum aquaticum (Vell.) Verdc.

Overview

Appearance
Myriophyllum aquaticum is an herbaceous, rooted, submerged to emergent plant that invades aquatic habitats throughout much of the United States. Stems are stout and blue-green in color.
Foliage
Leaves are abundant, whorled, pinnately compound, and finely dissected. Submersed leaves are 0.6-1.4 in. (1.5-3.5 cm) long and have 20 to 30 divisions per leaf. Emergent leaves are 0.8-2 in. (2-5 cm) long, less divided and greener than the submersed leaves.
Flowers
As only female plants occur in North America, reproduction occurs vegetatively. Inconspicuous flowers are formed in the axils of the emergent leaves in the spring (sometimes fall).
Fruit
No fertile fruit is known to be produced in the United States.
Ecological Threat
Myriophyllum aquaticum's potential range is yet to be determined. In more southern regions, this plant forms monocultures that clog waterways, impeding recreational and commercial boating activities. These monocultures also disrupt the growth of native aquatic plants and provide breeding areas for mosquitoes. Myriophyllum aquaticum is a common water garden plant, which has the potential to escape into local waterways. Control of this plant is extremely costly.

Resources

Selected Images


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2308002

parrotfeather
Myriophyllum aquaticum
Plant(s)
Alison Fox
5400573
5400573

parrotfeather
Myriophyllum aquaticum
Infestation
Graves Lovell
5392396
5392396

parrotfeather
Myriophyllum aquaticum
Foliage
John M. Randall
5456208
5456208

parrotfeather
Myriophyllum aquaticum
Foliage
Leslie J. Mehrhoff
5400575
5400575

parrotfeather
Myriophyllum aquaticum
Foliage
Graves Lovell
5271054
5271054

parrotfeather
Myriophyllum aquaticum
Plant(s)
Leslie J. Mehrhoff
5392393
5392393

parrotfeather
Myriophyllum aquaticum
Foliage
John M. Randall
5456201
5456201

parrotfeather
Myriophyllum aquaticum
Foliage
Leslie J. Mehrhoff
5400572
5400572

parrotfeather
Myriophyllum aquaticum
Foliage
Graves Lovell

Maps


EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit www.eddmaps.org

EDDMapS Distribution

State Regulated List - This map identifies those states that list this species on their regulated list. For more information, visit Invasive.org

State Regulated List

Most Troublesome / Most Common Agricultural Weed List
This map identifies those states that consider this species either most troublesome or most common in at least one commodity. For more information, visit the MTMC project page.

State Regulated List
Legend
   No Data for this state
   Troublesome or Common weed in one or more crops

Taxonomic Rank

Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Subclass: Rosidae
Order: Haloragales
Family: Haloragaceae
Genus: Myriophyllum

Other System Links

Plants: MYAQ2
Bayer: MYPBR
GRIN: 400091
ITIS: 503904
NPDN Pest: PCDABBA

Synonyms and Other Names

Other Common Names:
parrotfeather watermilfoil, water-feather, Brazilian water-milfoil, parrotfeather

Related Scientific Names:

Enydria aquatica (Vell.) Verdc.(Synonym)
Myriophyllum brasiliense (Vell.) Verdc.(Synonym)
Myriophyllum proserpinacoides (Vell.) Verdc.(Synonym)

Categories

Category: Aquatic
Category: Forbs/Herbs