Native Plants
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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.
From the Image Gallery
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Plant Characteristics
Duration: PerennialHabit: Herb
Fruit Type: Schizocarp
Size Notes: Stems up to about 8 feet long, mostly submerged.
Bloom Information
Bloom Color: WhiteBloom Time: Apr , May , Jun , Jul , Aug , Sep
Bloom Notes: Flowers are inconspicuous.
Distribution
USA: CT , MA , ME , MI , MN , NH , NY , RI , VT , WICanada: NB , NL , NS , ON
Growing Conditions
Aquatic: yesNational Wetland Indicator Status
Region: | AGCP | AK | AW | CB | EMP | GP | HI | MW | NCNE | WMVE |
Status: | OBL |
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 PlantsFNA: Find Myriophyllum alterniflorum in the Flora of North America (if available)
Google: Search Google for Myriophyllum alterniflorum
Metadata
Record Modified: 2023-04-05Research By: TWC Staff