- What is it? This underwater plant usually
grows in lake water 3 to 10 feet deep. Its wavy leaves
with fine-toothed edges make it appear "crispy". It
was accidentally introduced when common carp were
stocked in North America.
- What's the problem? This invader grows well in
even under ice. It begins early in the spring and
shades out native plants, forming dense mats that make it
tough to boat or swim. When curly-leaf pondweed dies
back in mid-summer it releases nutrients which can cause
algal blooms and other problems.
- How is it spread? It is easily spread by boats
and trailers. This plant
can spread from fragments on a few inches long.
- How do I recognize it?
- Summer foliage described as thick, waxy & "crispy"
Curly edged leaves look like lasagna noodles
- Leaf placement is alternate along stem
- Leaves are
approx .25" - .5" wide & 1.25" - 4.75" long
have fine serrations along the edges
- Look alike plants. There are many other
types of native Pondweeds that look similar but pose no
threat. The most similar is the Clasping-Leaf
Pondweed. However, its leaves have a more pointed tip
and lack the serrated edges of the Curly-Leaf variety.
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