Myriophyllum
water-milfoil
Specimens
Photos
Origin: Native
Conservation Status: Not of concern
Description:
[none provided]
Accepted Name:
Myriophyllum
Synonyms & Misapplications:
(none provided)
Species in Myriophyllum:
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Myriophyllum aquaticum – parrot's feather, water feather, South American water milfoil
Occurring on both sides of the Cascades crest in Washington; British Columbia to California and Idaho, east across the southwest to central and eastern North America. -
Myriophyllum heterophyllum – two-leaf milfoil, various-leaved water-milfoil Occurring west of the Cascades crest, where known only from the Puget Sound lowlands; British Columbia to Washington, native from Texas to central and eastern North America.
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Myriophyllum hippuroides – western milfoil, western water milfoil Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; British Columbia to California; introduced in Illinois.
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Myriophyllum pinnatum – cutleaf water-milfoil Occurring west of the Cascades crest in Washington, where known only from Thurston County; southern British Columbia to Oregon, also in eastern North America.
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Myriophyllum quitense – Andean water milfoil, waterwort water milfoil Occurring in scattered locations on both sides of the Cascades crest in Washington; British Columbia to California, east to Montana, Wyoming, Utah, and Arizona, also in northeastern North America.
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Myriophyllum sibiricum – American milfoil, northern milfoil, Siberian water milfoil Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
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Myriophyllum spicatum – Eurasian water milfoil, spiked water milfoil Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across most of North America to the Atlantic Coast.
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Myriophyllum ussuriense – terrestrial water milfoil, Ussurian milfoil Occurring west of the Cascades crest in Washington, where known only from Wahkiakum County. British Columbia to Oregon; also in Eurasia.
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Myriophyllum verticillatum – verticillate milfoil, whorled water milfoil Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across most of North America to the Atlantic Coast except in the southeastern U.S.
Additional Resources:
PNW Herbaria: Specimen records of Myriophyllum in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Myriophyllum checklist entry
OregonFlora: Myriophyllum information
E-Flora BC: Myriophyllum atlas page
CalPhotos: Myriophyllum photos
105 photographs:
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