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Invasive Species Highlight: Variable-Leaf Water Milfoil

2021-01-26T08:57:32-05:00

What is Variable-Leaf (or two-leaf) Water Milfoil? Variable Leaf Water Milfoil (Myriophyllum heterophyllum) is a submerged aquatic invasive plant that looks like some native species including native milfoils. The plant’s feathery leaves are arranged in dense whorls, usually four to six leaves per whorl. Each feathery leaf has seven to READ MORE

Invasive Species Highlight: Hydrilla

2021-01-26T08:57:32-05:00

What is Hydrilla? Hydrilla (Hydrilla verticillata) is a submerged aquatic invasive plant that looks similar to the native American waterweed (Elodea canadensis) and also appears similar to another aquatic  invasive plant, Brazilian elodea (Egeria densa). Hydrilla has visibly serrated leaves that grow in whorls of four to eight, and small READ MORE

Invasive Species Highlight: Brittle Naiad

2021-01-26T08:57:32-05:00

What is Brittle (European or Spiny) Naiad? Brittle Naiad (Najas minor) is a submerged aquatic invasive plant with thin stiff leaves that have serrated edges. The serrations on leaf edges are visible without magnification. Native versions of naiad also have serrated leaves but these are tiny and require magnification to READ MORE

Aquatic Invasive Species: Eurasian Watermilfoil

2021-01-26T08:57:54-05:00

Photo Credit: Rob Routledge, Sault College, Bugwood.org Eurasian watermilfoil (Myriophyllum spicatum) is an aquatic invasive perennial plant that originated from Europe and Asia. This submerged plant resembles similar native watermilfoils, but can be distinguished by the blunt, snipped-off appearance of its leaf tips. The Eurasian watermilfoil typically has READ MORE

Aquatic Invasive Species: Curly Leaf Pond Weed

2021-01-26T08:57:54-05:00

Leslie J. Mehrhoff, University of Connecticut, Bugwood.org Curly Leaf Pond Weed (Potamogeton crispus) is a submerged invasive perennial plant that looks very similar to many native species. A distinguishing characteristic is the scallop on its leaf edges which makes each rigid leaf look like a little wavy reddish-green READ MORE

Aquatic Invasive Species: Yellow Floating Heart

2021-01-26T08:57:55-05:00

Photo by David Cappaert, Bugwood.org Yellow Floating Heart (Nymphoides peltata) is a perennial non-native invasive aquatic plant that originated in Europe and Asia. The Yellow Floating Heart, which has a bright yellow flower, was introduced to North America as an ornamental plant for backyard ponds. It causes damage to READ MORE