aquatic plant identification - uwsp...aquatic plant identification susan knight michelle nault paul...
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Aquatic Plant Identification
Susan KnightMichelle NaultPaul Skawinski
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Why do we care so much about aquatic plants?
A diverse native aquatic plant community is the foundation for healthy, balanced lakes. They provide many benefits including food, shelter and nurseries for fish, wildlife and insects.
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• Emergent, Floating, Submersed• Floating• Submersed:
• Plants with Smooth Leaf Edges• Pondweeds
• Broad or narrow leaves• With or without floating leaves• Glands• Stipules
• Other common plants• Plants with Finely Dissected or Thread‐like leaves• Rosettes
• Reproduction• Vegetative• Sexual
Bob Korth Photo
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PickerelweedArrowhead
Emergent Plants with Broad or Narrow Leaves
CattailThree‐way Sedge Soft stem bulrush
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Fragrant water lily
SpatterdockWatershield
Water smartweed
Floating‐leaf Plants:Rooted and not rooted
Small duckweed
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Opposite LeavesGolden pertWhorled Leaves
Eurasian water‐milfoil
Whorled LeavesElodea
Submersed Plants:Opposite and
Whorled Leaves
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Submersed Plants with Smooth‐edged Leaves
ElodeaWild Celery
Pondweeds
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White‐stem pondweedP. praelongis
Fern‐leaf pondweedP. robbinsii
Alternate Leaves: Pondweeds
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Leafy pondweedP. foliosus
Large‐leaf pondweeedP. amplifolius
PondweedsLeaves broad to narrow
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Variable pondweedP. gramineus
Fries pondweedP. friesii
Floating‐leaf pondweedP. natans
Floating leaves only
Submersed Leaves only
Both floating and submersed leaves
PondweedsWith and without floating leaves
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Stiff pondweedP. strictifolius
Large‐leaf pondweedP. amplifolius
PondweedsStipules: Leafy bits near leaves and stems
Fibrous, shreddystipules
Large, stiff stipules
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Coontail
Whorled water‐milfoil
Water marigold
Common bladderwort
Submersed Plants with
Finely Divided Leaves
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Submersed plants with finely‐divided leaves:Water‐milfoils
Northern water‐milfoilEurasian water‐milfoil
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Common bladderwortUtricularia vulgaris
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Common bladderwortUtricularia vulgaris
Bladders on leaf
Bladder with prey inside
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Rosettes:Stiff, tough, often evergreen
Leaves come from base of plantSandy or wave‐swept shores
Low nutrient watersUnrelated to each otherMostly northern WI
Water lobelia
Dwarf water‐milfoil
Quillwort
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Reproduction:Vegetative
Clonal growth: runners, branching, fragments
Turions
Sexual Flowers/Fruits
Wild celery
Dwarf water‐milfoilEurasian water‐milfoil
Large‐leaf pondweed
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Bladderworts
Pondweeds
Curly‐leaf pondweed
Reproduction:Vegetative
Clonal growth: runners, branching, fragmentsTurions: resting organs, usually to overwinter
Sexual Flowers/Fruits
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Water marigoldPurple bladderwort
Reproduction:Vegetative
Clonal growth: runners, branching, fragmentsTurions
Sexual Flowers/Fruits
Common bladderwort
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Pondweed:Flowers andNutlets
(Magnified)
Water‐milfoil:Flowers and
Fruits(Magnified)
Reproduction:Sexual
Flowers/Fruits
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Nymphoides peltata, Yellow floating heart
Nitellopsis obtusaStarry stonewort
Aquatic Invasive Plants Threatening WI
Eichhornia crassipesWater hyacinth
Pistia stratiotes,Water lettuce
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Freshwater SpongeNot a plantBut an animal