Photographer: Steve C. Garske
Myriophyllum spicatum L.
Eurasian water-milfoil, European water-milfoil, spike water-milfoil
Myriophyllum: from Greek myrios, "numberless," and phyllon, "leaf," alluding to the many divisions of the submerged leaves of these aquatic plants
Restricted Invasive - Eradicate!
|Status: ||Introduced - naturalized; ecologically invasive|
|Plant: ||perennial, submersed aquatic; stems long, weak, to more than 7' long, branching at the water surface; from rhizomes|
|Flower: ||4-parted, no winter buds; inflorescence a spike held out of the water with flowers in whorls from the axils of the short bracts|
|Fruit:||4 parted, with a mostly smooth surface|
|Leaf:||widely-spaced whorls of 4-5 leaves, short-stalked; finely, pinnately-divided into 14-20 pairs of thread-like leaflets of about the same length|
|Habitat: ||water 3'-14' deep|