… Potential environmental impacts and economic damages of Eurasian watermilfoil (Myriophyllum spicatum) in western Nevada and northeastern California. Spike Water milfoil (Myriophyllum spicatum) Native floating plants. Myriophyllum spicatum Photo courtesy Joseph DiTomaso. Summary of Invasiveness Top of page. All invasive species have a native habitat somewhere, many invasive aquatic plants were first transported as ornamental aquarium plants. One of the reasons why this species of milfoil is so invasive is because it can survive in any climate, including under frozen lakes. It can tolerate a range of salinity, acidity, and temperature. Myriophyllum verticillatum: lower bracts of inflorescence 2 or more times as long as the flowers or fruits, prominently toothed to lobed, upper bracts of inflorescence toothed to lobed (vs. M. spicatum, with lower bracts of inflorescence less than 2 times as long as the flowers or fruits, upper bracts of inflorescence entire to minutely toothed). Invasive Species - (Myriophyllum spicatum) Restricted in Michigan Eurasian Watermilfoil is an aquatic plant with stems that are whitish-pick to reddish-brown, leaves that are greyish-green with finely divided pairs of leaflets that are 1/2 - 2 inches long that give the plant a feathery appearance. Eurasian watermilfoil (myriophyllum spicatum), the more aggressive colonizer of the two, has been found in several Maine water bodies. It tends to be few branched on the lower stem and much branched near the water's surface, forming a mat that blocks out the sun, inhibiting the growth of other aquatic plants and degrading or destroying food sources and habitat for native aquatic wildlife. Eurasian Water-milfoil is a seriously problematic aquatic invasive species. Yes. Eurasian Watermilfoil Myriophyllum spicatum is naturalized in Texas and other States and is considered an invasive plant in Texas. Eurasian […] Eurasian Water-Milfoil. (Myriophyllum spicatum) Photo credit: Alison Fox, University of Florida, Bugwood.org An emergent, herbaceous aquatic plant, Eurasian watermilfoil, usually extends 3 to … Myriophyllum spicatum L. Water milfoil family (Halogoraceae) Origin: Eurasia and Africa Background Introduced accidentally from Eurasia in the 1940s, Eurasian water-milfoil possibly escaped from an aquarium or was brought in on a commercial or private boat. Eurasian watermilfoil is a submersed plant that grows in a variety of still and flowing freshwater bodies. Common names: spike watermilfoil Myriophyllum spicatum (Eurasian watermilfoil) is a common submersed aquatic perennial (family Haloragaceae). ... (Myriophyllum spicatum) - Invading Species - WDNR." Eurasian watermilfoil can be found in freshwater lakes, ponds, and canals with slow-moving waters in northern and central California, particularly in the San Francisco Bay and San Joaquin … Yellow water lily (Nuphar lutea) White water lily (Nymphaea alba) Broad leaved pondweed (Potamogeton natans) Importance of controlling invasive aquatic species. Myriophyllum spicatum. Integrated Taxonomic Information System. The leaves are arranged in whorls of 3-6. I find this species very cool and highly interesting. M. spicatum has been found to hybridize with native M. sibiricum (producing M. sibricum X spicatum) with an intermediate number of leaf segments. Geographic Distribution. Myriophyllum spicatum is native to Europe, Asia, and North Africa. Where do they come from and how do they spread? Scientific name: Myriophyllum spicatum What Is It? In the State of Wisconsin this is high priority invasive … Weed Technology 14(3):511-518. 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