Myriophyllum sp.
Water-milfoil, Water-Milfoil
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Family: Haloragaceae · Type: Perennial · Variable; species dependent
Myriophyllum sp. (Water-milfoil) is a non-native California perennial in the Haloragaceae family.
How to tell it apart
vs Hippuris: Myriophyllum has feathery divided leaves; Hippuris has simple, undivided linear leaves in whorls.; vs Elodea: Myriophyllum has leaves pinnately divided into thread-like segments; Elodea has simple oval leaves.; vs Ceratophyllum: Myriophyllum leaves fork from a central spine; Ceratophyllum leaves fork repeatedly without central axis.; vs Ranunculus: Myriophyllum has whorled feathery leaves; aquatic Ranunculus has alternate or basal divided leaves.; vs Potamogeton: Myriophyllum has feathery divided leaves; Potamogeton has simple, entire leaves (blade-like or oval).
Frequently asked questions
Is Myriophyllum sp. native to California?
No. Myriophyllum sp. is not native to California (recorded as variable; species dependent).
What plant family does Myriophyllum sp. belong to?
Myriophyllum sp. is in the Haloragaceae family, genus Myriophyllum.
Related species
Other California species in the same genus, family, or bioregion.
- Myriophyllum spicatum — Eurasian water-milfoil
- Myriophyllum verticillatum — Whorled water-milfoil
- Myriophyllum aquaticum — Parrot's feather
- Myriophyllum hippuroides — Western water-milfoil
- Myriophyllum quitense — Andean water-milfoil
- Myriophyllum sibiricum — Siberian water-milfoil
- Haloragaceae sp. — Water-milfoil family
Sources: Jepson eFlora · CalPhotos
Last updated 2026-04-14
Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Cal-IPC, and more.