Description: Dark-green, feathery leaves are grouped in fours around a hollow stem that is usually buff- or pinkish-colored; leaves are comprised of 5 to 10 pairs of leaflets. The Eurasian watermilfoil is an attractive, feathery plant that was once sold as an aquarium plant in the United States, having been introduced to the U.S. as early as the late 1800s. Recognizing Eurasian Water-milfoil and Native Look-a-Likes The Wisconsin Department of Natural Resources provides equal opportunity in its employment, programs, services, and functions under an Affirmative Action Plan. Eurasian watermilfoil. It grows in still to flowing waters, and tolerates a wide temperature range, It can form thick, dense mats that decrease oxygen levels, shade native plants and obstruct recreational activities, negatively impacting human activities and native fish and wildlife. The roots are slender and fragile. Originally from Eurasia and North Africa, it was introduced to North America in 1961 in Lake Erie, Ontario. spiked water milfoil. Eurasian Water-milfoil is a seriously problematic aquatic invasive species. Eurasian watermilfoil is a submersed perennial plant, with feather-like leaves grouped in 3-6 whorls around the stem. The plant became increasingly invasive towards the late 1960s, entering numerous waterways and distributing itself throughout lakes by boats and boat trailers. And although fish may initially experience a favorable edge effect, the characteristics of Eurasian water-milfoil's overabundant growth negate any short-term benefits it may provide fish in healthy waters. In fact, it’s been documented on every continent except for Antarctica. The open understory can also provide foraging opportunities for larger predatory fish. This aquatic plant is quite commonly found in the water of Europe, Asia and Northern Africa. Plants overwinter rooted in the sediment and grow rapidly once favorable warm temperatures are reached in the spring. Quick facts. The … Eurasian water-milfoil has less value as a food source for waterfowl than the native plants it replaces (Aiken et al. The Pennsylvania Flora Project of Morris Arboretum. EWM out-competes native vegetation and degrades aquatic habitats by reducing biodiversity. This plant was accidentally introduced in the Chesapeake Bay in the early 20 th century. 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. It is generally found in water less than 20 ft (6 m), and mats form in waters less than 15 ft (4.5 m). Fish—Eurasian watermilfoil can provide good habitat for fry and juvenile fish species. Milfoil is most commonly transported via boats, motors, trailers, bilges, live wells, or bait buckets, and if moist ca… In 1942, it was first documented in … Facts about Milfoil. They are a very highly used method in many states. The leaves are arranged in whorls of 3-6. Mechanical/Manual The stems branch and commonly grow to lengths up to 10 feet. Its leaves are feather-like with 12 or more thin segments (native milfoil has 11 or fewer leaf segments). Eurasian water milfoil produces small, 4-parted flowers on a spike that sticks out of the water two to four inches. Eurasian watermilfoil reproduces by fragmentation, thus it does not rely on seed for reproduction. Page 1 of 35 Next > Last > * Total Lakes and Rivers = total unique Waterbody ID Codes (WBICs). Unlike native milfoils, each leaf is divided into paired leaflets with 10-20 pairs per leaf (native milfoils typically have less). 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