Virginia Tech Weed Identification Guide

Curlyleaf Pondweed: Potamogeton crispus

cpondweed7-17d.jpg (108815 bytes) 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.

Roots:  Both rhizomes and stolons occur.

Stems:  Branching, somewhat flattened, often whitish in color.

cpondweed7-17c.jpg (98663 bytes)
cpondweed7-17.jpg (122382 bytes) Flowers:  Occur on flower stalks (peduncles) that arise from the area between the leaf bases and the stems (axillary regions).

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.