Curlyleaf Pondweed

Potamogeton crispus

Weed Description
A submersed aquatic perennial with both rhizomes and stolons and distinctive curly leaves. Curlyleaf pondweed can form thick mats in lakes and rivers.

Leaves
Leaves are arranged alternately along the stem, are submersed, and do not occur on petioles (sessile). Leaves are approximately 2 to 3 inches long and 1/4 to 1/2 inch wide. The margins are distinctively wavy or curled, and most leaves have a prominent red-tinged midvein. Some leaves are also red-tinged throughout.

Stems
Branching, somewhat flattened, often whitish in color.

Flowers
Occur on flower stalks (peduncles) that arise from the area between the leaf bases and the stems (axillary regions).

Roots
Both rhizomes and stolons occur.

Identifying Characteristics
The distinctive wavy leaf margins and rhizomes and stolons of this weed make it easy to distinguish from most other submersed aquatic plants.

Office of Programs

University of Missouri

Curlyleaf Pondweed

Potamogeton crispus