Weed Identification


Welcome to SePRO's Aquatic Weed Identification Guide. This guide will serve as your first step toward identifying and managing your aquatic weed problem. To get started, click on whichever group of aquatic weeds to which you feel your problem weed belongs and work through the examples until you find it.



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Clasping-Leaf Pondweed

Potamogeton richardsonii

Clasping-leaf pondweed leaves are wide and wavy. They have a broad base that wraps around the stem. The upper part of the stem is branched and leafy with leaves alternately arranged on the stem.

Also known as: - No listed alias -


Ceratophyllum demersum

Coontail is a submersed aquatic plant and can be easily identified by the "raccoon tail" cluster of leaves at the end of the main stalk. It has slender stems and leather-like leaves. Coontail is called hornwort when it is sold for aquarium decorations. It then spreads into ponds after aquariums are dumped into water bodies.

Also known as: Hornwort

Creeping Water Primrose

Ludwigia hexapetala

Creeping water primrose is a perennial plant that stands erect along the shoreline but also forms long runners (up to 16 feet) that creep across wet soil or float out across the water surface. The leaves vary from green to red tinged. The plants flower yellow in all seasons except winter. The yellow flower is very distinctive of creeping water primrose. Flowers vary in size from 1 inch to 2 inches in diameter.

Also known as: Primrose

Curly-Leaf Pondweed

Potamogeton crispus

Curly-leaf pondweed leaves are somewhat stiff and crinkled, resembling lasagna noodles. They are approximately 1/2 inch wide and 2 - 3 inches long. The leaves are arranged alternately around the stem. Leaves become denser at the end of branches. Curly leaf-pondweed can be confused with clasping leaf pondweed.

Also known as: Crispy leaved pondweed; crisped pondweed