QUICK IDENTIFICATION
- Feathery underwater foliage
- 12 or more pairs of leaflets
- Leaves collapse around the stem when removed from the water
- Mature leaves in whorls of four around the stem
- Length up to 15 feet
Weed Pictures
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Type | Information |
---|---|
Toxicity | Non-toxic. |
Control | Diver hand pulling/dredging, aquatic herbicide and installation of bottom barriers. Contact your County Weed District or local Applicator for more information. |
Habitat | Lakes, rivers and sloughs. |
Root | Slender, fragile and extensive root system. |
Leaf Shape | Thread-like with four leaflets arranged around the stem. |
Lifespan | Perennial; two years or longer. |
Priority 2A Weed | Common in isolated areas of Montana. |
Similar Looking Plants | Northern native milfoil and parrotfeather. |
Important Information | Forms very dense mats of vegetation on the surface of the water; extremely rapid reproduction and can infest an entire lake within two years of introduction to the system. A plant fragment with 2 nodes (areas where leaves are located) can start a new infestation. |