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Plant Database

Search for native plants by scientific name, common name or family. If you are not sure what you are looking for, try the Combination Search or our Recommended Species lists.

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Myriophyllum alterniflorum

Myriophyllum alterniflorum DC.

Alternateflower Watermilfoil

Haloragaceae (Water Milfoil Family)

Synonym(s): Myriophyllum alterniflorum var. americanum

USDA Symbol: MYAL3

USDA Native Status: L48 (N), CAN (N), GL (N), SPM (N)

A submerged aquatic plant. Avoid using milfoil since it is often confused with the European which is invasive.

 

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Plant Characteristics

Duration: Perennial
Habit: Herb
Fruit Type: Schizocarp
Size Notes: Stems up to about 8 feet long, mostly submerged.

Bloom Information

Bloom Color: White
Bloom Time: Apr , May , Jun , Jul , Aug , Sep
Bloom Notes: Flowers are inconspicuous.

Distribution

USA: CT , MA , ME , MI , MN , NH , NY , RI , VT , WI
Canada: NB , NL , NS , ON

Growing Conditions

Aquatic: yes

National Wetland Indicator Status

Region:AGCPAKAWCBEMPGPHIMWNCNEWMVE
Status: OBL
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

Web Reference

Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 26 - Minnesota Wildflowers: a field guide to the flora of Minnesota (2009)
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Myriophyllum alterniflorum in USDA Plants
FNA: Find Myriophyllum alterniflorum in the Flora of North America (if available)
Google: Search Google for Myriophyllum alterniflorum

Metadata

Record Modified: 2023-04-05
Research By: TWC Staff

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