Haloragaceae
Water Milfoil Family
Synonyms:
Haloragidaceae, orthographic variant [Abrams]
1 genus
10 species
10 species
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Myriophyllum aquaticum – parrot's feather, water feather, South American water milfoil
Distribution: 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.
Habitat: Ponds and slow-moving streams.
Origin: Introduced from South America
Flowers: May-July
Growth Duration: Perennial
Distribution: 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.
Habitat: Ponds and slow-moving streams.
Origin: Introduced from South America
Flowers: May-July
Growth Duration: Perennial
Myriophyllum heterophyllum – two-leaf milfoil, various-leaved water-milfoil
Distribution: 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.
Habitat: Lakes and ponds.
Origin: Introduced from central and eastern North America
Flowers: May-October
Growth Duration: Perennial
Distribution: 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.
Habitat: Lakes and ponds.
Origin: Introduced from central and eastern North America
Flowers: May-October
Growth Duration: Perennial
Myriophyllum hippuroides – western milfoil, western water milfoil
Distribution: Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; British Columbia to California; introduced in Illinois.
Habitat: Ponds and slow-moving streams.
Origin: Native
Flowers: May-October
Growth Duration: Perennial
Distribution: Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; British Columbia to California; introduced in Illinois.
Habitat: Ponds and slow-moving streams.
Origin: Native
Flowers: May-October
Growth Duration: Perennial
Myriophyllum pinnatum – cutleaf water-milfoil
Distribution: Occurring west of the Cascades crest in Washington, where known only from Thurston County; southern British Columbia to Oregon, also in eastern North America.
Habitat: Lakes, sloughs, ditches, slow streams.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Distribution: Occurring west of the Cascades crest in Washington, where known only from Thurston County; southern British Columbia to Oregon, also in eastern North America.
Habitat: Lakes, sloughs, ditches, slow streams.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Myriophyllum quitense – Andean water milfoil, waterwort water milfoil
Distribution: 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.
Habitat: Ponds and slow-moving streams.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Distribution: 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.
Habitat: Ponds and slow-moving streams.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Myriophyllum sibiricum – American milfoil, northern milfoil, Siberian water milfoil
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Ponds and quiet streams, often in brackish water.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Ponds and quiet streams, often in brackish water.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Myriophyllum sibiricum × Myriophyllum spicatum – hybrid Eurasian milfoil
Distribution: Occurring on both sides of the Cascades crest in Washington; expected to occur wherever the two species co-occur.
Habitat: Ponds and quiet streams, including brackish water.
Origin: Introduced
Flowers: June-August
Growth Duration: Perennial
Distribution: Occurring on both sides of the Cascades crest in Washington; expected to occur wherever the two species co-occur.
Habitat: Ponds and quiet streams, including brackish water.
Origin: Introduced
Flowers: June-August
Growth Duration: Perennial
Myriophyllum spicatum – spiked water milfoil
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across most of North America to the Atlantic Coast.
Habitat: Ponds, lakes, and quiet streams.
Origin: Introduced from Eurasia
Flowers: April-October
Growth Duration: Perennial
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across most of North America to the Atlantic Coast.
Habitat: Ponds, lakes, and quiet streams.
Origin: Introduced from Eurasia
Flowers: April-October
Growth Duration: Perennial
Myriophyllum ussuriense – terrestrial water milfoil, Ussurian milfoil
Distribution: Occurring west of the Cascades crest in Washington, where known only from Wahkiakum County. British Columbia to Oregon; also in Eurasia.
Habitat: Freshwater intertidal zone on mudflats. British Columbia south to Oregon; circumboreal.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Distribution: Occurring west of the Cascades crest in Washington, where known only from Wahkiakum County. British Columbia to Oregon; also in Eurasia.
Habitat: Freshwater intertidal zone on mudflats. British Columbia south to Oregon; circumboreal.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Myriophyllum verticillatum – verticillate milfoil, whorled water milfoil
Distribution: 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.
Habitat: Aquatic habitats below the water surface.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Distribution: 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.
Habitat: Aquatic habitats below the water surface.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
