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Aquatic Plant Identification o Emergent, Floating, Submersed o Submersed: o Plants with Finely Dissected or Thread like leaves o Plants with Smooth Leaf Edges o Opposite, whorled and alternate leaves o Pondweeds o Broad and narrow leaves o With, without floating leaves o Glands o Stipules o Turions o Flowers o Fruits o Rosettes Bob Korth Photo Arrowhead Pickerelweed Emergent Plants with Broad or Narrow Leaves Cattail Three-way Sedge Soft stem bulrush Spatterdock Watershield Small duckweed Floating-leaf Plants: Rooted and not rooted Water smartweed Fragrant water lily Coontail Submersed Plants with Finely Divided Leaves Water marigold Common bladderwort Whorled water-milfoil Common bladderwort Utricularia vulgaris Bladders on leaf Bladder with prey inside Submersed plants with finelydivided leaves: Watermilfoils Eurasian water-milfoil Northern water-milfoil Submersed Plants with Smooth-edged Leaves Wild Celery Elodea Pondweeds Whorled Leaves Opposite Leaves Elodea Golden pert Whorled Leaves Eurasian water-milfoil Alternate Leaves: Pondweeds White-stem pondweed P. praelongis Fern-leaf pondweed P. robbinsii Pondweeds Leaves broad to narrow Leafy pondweed P. foliosus Large-leaf pondweeed P. amplifolius Floating leaves only Submersed Leaves only Floating-leaf pondweed P. natans Fries pondweed P. friesii Pondweeds With and without floating leaves Variable pondweed P. gramineus Both floating and submersed leaves Lacunae: “Empty” cells along midrib Pondweeds Lacunae and Nodal glands Nodal glands: oil glands at base of leaf Pondweeds Fibrous, shreddy stipules Stipules: Leafy bits near leaves and stems Large, stiff stipules Large-leaf pondweed P. amplifolius Stiff pondweed P. strictifolius Turions: Vegetative overwintering organs Bladderworts Pondweeds Water-milfoil Curly-leaf pondweed Common bladderwort Aquatic Plant Flowers Purple bladderwort Water marigold Pondweed: Flowers and Nutlets (Magnified) Watermilfoil: Flowers and Fruits (Magnified) Rosettes: Stiff, tough, often evergreen Leaves come from base of plant Sandy or wave-swept shores Low nutrient waters Unrelated to each other Mostly northern WI Dwarf water-milfoil Water lobelia Quillwort INVASIVE EXOTICS Water Chestnut Frogbit Hydrilla Yellow Floating Heart Hydrilla Hydrilla Egeria Egeria Water chestnut Trapa natans Yellow floating heart Nymphoides peltata European Frogbit Hydrocharis morsus-ranae
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