Curly-leafed Pondweed (Potamogeton crispus)
- Native to Eurasia, Africa, and Australia
- Accidentally introduced to U.S. waters by hobbyists in the mid-1880s
- Exists throughout the United States
Curly-leafed Pondweed, Robert Johnson, Cornell University. Used with permission.
- Plant Characteristics
- Submersed rooted perennial plant with reddish-green leaves that have distinct wavy edges
- Plant's flat, spaghetti-like reddish-brown stems grow 1 to 3 feet long
- Leaves are finely toothed, oblong in shape, and typically about 3 inches long
- Spring leaves are wider than winter leaves and have wavy leaf margins
- Spreads through fragmentation, rhizomes and from burr-like winter buds called turions
- One of the first plants to emerge in early spring and it can grow under ice
- Peak growth occurs in mid-June
- Becomes dormant in July and August. This mid-summer die-off leads to loss of habitat for fish and invertebrates, can increase turbidity, and can lead to oxygen depletion, increase in nutrients and subsequent algae blooms.
- Forms dense vegetation mats
- Found in lakes, ponds, and streams throughout New York State