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11 plants by

Scientific Common Name

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Alternanthera philoxeroides

Alligatorweed, Alligator Weed, Pig Weed

Leaves and stem

Leaves and stem

Elodea densa

Brazilian Waterweed

Form blooming in water

Form blooming in water

Growing in the water

Growing in the water

Leaves and stem

Leaves and stem

Stem with flowers

Stem with flowers

Stem and leaves

Stem and leaves

Hydrilla verticillata

Florida Elodea, Hydrilla, Waterthyme

Infestation in FL

Infestation in FL

Floating on water

Floating on water

Stem and leaves in a whorl

Stem and leaves in a whorl

Small 6-petal flowers

Small 6-petal flowers

Whorl of leaves at end of stem

Whorl of leaves at end of stem

Hydrocleys nymphoides

Water Poppy

Form in September in Brazil

Form in September in Brazil

Flower and leaves in October in Hsinchu County, Taiwan

Flower and leaves in October in Hsinchu County, Taiwan

Ludwigia hexapetala

Creeping Water Primrose, Large-Flower Primrose Willow, Primrose Willow, Six Petal Water Primrose, Uruguay Primrose Willow

Flower and lanceolate leaves

Flower and lanceolate leaves

Leaves in a rosette

Leaves in a rosette

Back of flower, stems with hairs

Back of flower, stems with hairs

Stem and leaves

Stem and leaves

Ludwigia longifolia

Longleaf Primrose Willow, Primrose Willow

Ludwigia longifolia

Ludwigia longifolia

Marchantia polymorpha

Common Liverwort, Cudweed, Liverwort, Umbrella Liverwort

Form (East Avenue, Rochester, NY)-Mid Summer

Form (East Avenue, Rochester, NY)-Mid Summer

Marchantia polymorpha L.

Marchantia polymorpha L.

Marchantia polymorpha L. Spore Stalk

Marchantia polymorpha L. Spore Stalk

Marchantia polymorpha

Marchantia polymorpha

Marchantia polymorpha gametophytes (female on left and male on r

Marchantia polymorpha gametophytes (female on left and male on r

Umbrella liverwort (with rosettes and brown thalli)

Umbrella liverwort (with rosettes and brown thalli)

Murdannia keisak

Asian Spiderwort, Marsh Dewflower

Opposite leaves

Opposite leaves

Rooting from the nodes

Rooting from the nodes

Myriophyllum spicatum

Eurasian watermilfoil, Spike Watermilfoil

Leaves and stem

Leaves and stem

Nymphoides cristata

Crested Floating Heart

Leaves with red margins

Leaves with red margins

Flower attachment

Flower attachment

Red underside of leaf

Red underside of leaf

Salvinia molesta

African Pyle, Aquarium Watermoss, Giant Salvinia, Kariba Weed, Waterfern

Young leaves are flatter

Young leaves are flatter

Infestation in an LA state park

Infestation in an LA state park

Egg beater structures

Egg beater structures