Myriophyllum spicatum
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| Myriophyllum spicatum L. |
Myriophyllum spicatum (Spiked Water-milfoil or Eurasian water milfoil) is a species of Myriophyllum native to Europe, Asia, and north Africa.
It is a floating aquatic plant, growing in still or slow-moving water, with slender stems up to 3 m long. The leaves are borne in whorls of four, bipinnate, with the numerous leaflets thread-like, 4-13 mm long. The flowers are produced in the leaf axils on a spike 5-15 cm long held vertically above the water surface, each flower inconspicuous, orange-red, 4-6 mm long.
It has been introduced to North America where it has become an invasive species in some areas.
