Watercress

Watercress over water.

Watercress stems and leaves are medium green. Young leaves are simple while mature leaves are compound with three to 11 leaflets.

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Water Spinach

Water spinach in large group covering water.

Water spinach is a trailing vine with milky sap. Alternate leaves are usually arrowhead shaped and grow to seven inches long with pointed tips.

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Spotted Water Hemlock

Spotted water hemlock in a forest.

Clusters of tiny white flowers grow atop this poisonous plant. Spotted water hemlock grows two to six feet tall and has compound leaves.

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Spikerush

Spikerush in a group.

Spikerush stems are straight and grow in clusters from the rhizomes. There are no leaves; flowers grow atop the stems.

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Smooth Waterhyssop

Close up of smooth waterhyssop flowers and leaves.

Smooth waterhyssop has many branches with bright green leaves that are succulent and thick. Small white flowers can be tinged with blue or pink.

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Pennsylvania Smartweed

Pennsylvania smartweed close up growing in a field.

Pennsylvania smartweed has sword shaped leaves and small flowers that grow in clusters at the ends of branches. Flowers are rose to white in color.

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Marshpepper Smartweed

Close up of marshpepper smartweed flowers in a small group.

Marshpepper smartweed has dark green sword shaped leaves and flower spikes that droop. The tiny flowers are spaced out and typically green to white.

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Swamp Smartweed

Swamp smartweed in a field.

Swamp smartweed has sword shaped leaves and small flowers that grow in clusters at the ends of branches. Flowers are greenish white with pink tips.

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Reed Canarygrass

Reed canarygrass in a field.

Reed canarygrass has tall round stems with alternate leaves that are tapered. Straw colored seed heads grow at the tops of the stems.

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Water Pennyworts

Close up of common pennywort leaves.

Water pennyworts have long thin stems, long thin leaf stalks, and leathery bright green leaves that are mostly circular with frilly edges.

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Torpedo Grass

Close up of torpedo grass seeds.

Torpedo grass grows up to three feet tall with narrow, stiff leaves that have sharp points and a waxy or white coating on the surface.

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Mud Plantain

Mud plantain in the water.

Mud plantain’s stems and leaves emerge; leaves are sword or egg shaped and leathery. Flowers have five thin petals and are usually purplish blue.

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Marsh Dewflower

Close up of marsh dewflower.

Marsh dewflower has round stems, lance shaped leaves, and flowers with three petals that are pinkish purple on the edges and white in the center.

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Giant Reed

Giant reed in large group.

Giant reed has thick round stems that grow in large clumps and can be six to 18 feet tall. Alternate leaves grow up to two feet long.

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Flowering Rush

Flowering rush flowers, some buds, some open, some spent on a single plant.

Flowering rush can be submersed or emersed and has round stems that can grow up to four feet tall. Clusters of pink flowers grow on a single stalk.

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Crested Floating Heart

Crested floating heart flowers and leaves.

Crested floating heart has heart shaped leaves eight inches long and six inches wide and showy flowers with frilly white petals and yellow centers.

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Common Pipewort

Common pipewort coming out of the water.

Common pipewort has grass like leaves and little white globes atop the stems that can grow up to three and a half feet tall.

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Cogongrass

Cogongrass in field.

The narrow leaves of cogongrass grow directly from the rhizomes; they are light green when young and turn orange to brown as they age.

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