| curlyleaf pondweed |
USDA PLANTS Symbol: POCR3 USDA ARS GRIN: 400123 ITIS: 39007 NAPIS: PEEABBB |
| Potamogeton crispus L. | |
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Taxonomic Rank: Liliopsida: Najadales: Potamogetonaceae |
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| Synonym(s): curly-leaved pondweed, curly pondweed | |
Curlyleaf pondweed is a perennial, submerged, aquatic herb that is native to Eurasia. Leaves are sessile, oblong, stiff, 1.6-3.9 in. (4-10 cm) long, 0.2-0.4 in. (5-10 mm) wide, translucent and have noticeably curly margins (resemble lasagna noodles). Flowering occurs in the summer to early fall, when emergent flowers develop. Flowers are brown, inconspicuous and wind pollinated. Fruits are flat with a pointed beak and are 0.2 in. (4-6mm) long. In the midsummer plants form turions (vegetative buds), from which new growth starts in fall or winter. Curlyleaf pondweed tolerates fresh or slightly brackish water and can grow in shallow, deep, still or flowing water. Plants can grow in clear or turbid water, but are mostly shade intolerant. Plants were introduced to the United States, possibly as a hitchhiker on boats, in the mid-1800s. |
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Identification, Biology, Control and Management Resources
- Global Invasive Species Database - Invasive Species Specialist Group
- Invasive Plant Atlas of New England - University of Connecticut
- Fact Sheet - Pennsylvania Dept. of Conservation and Natural Resources
| Selected Images from Invasive.org | View All Images at Invasive.org |
 Feature(s); Turion Leslie J. Mehrhoff, University of Connecticut, Bugwood.org Additional Resolutions & Image Usage |
 Plant(s); Leslie J. Mehrhoff, University of Connecticut, Bugwood.org Additional Resolutions & Image Usage |
 Foliage; Richard Old, XID Services, Inc., Bugwood.org Additional Resolutions & Image Usage |
 Foliage; Chris Evans, River to River CWMA, Bugwood.org Additional Resolutions & Image Usage |
 Plant(s); Richard Old, XID Services, Inc., Bugwood.org Additional Resolutions & Image Usage |
 Infestation; Chris Evans, River to River CWMA, Bugwood.org Additional Resolutions & Image Usage |
 Diagram or Graphic; Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 1: 81. USDA PLANTS Database, USDA NRCS PLANTS Database, Bugwood.org Additional Resolutions & Image Usage |
 Diagram or Graphic; USDA NRCS. Wetland flora: Field office illustrated guide to plant species. USDA Natural Resources Conservation Service. USDA PLANTS Database, USDA NRCS PLANTS Database, Bugwood.org Additional Resolutions & Image Usage |
Taxonomic References:
- USDA, NRCS. 2001. The PLANTS Database, Version 3.1, National Plant Data Center, Baton Rouge, LA 70874-4490 USA.
Invasive Listing Sources:
- Faith Campbell, 1998. Plants that Hog the Garden: Invasive Plants in the United States. Fine Gardening Online
- Hoffman, R. & K. Kearns, Eds. 1997. Wisconsin manual of control recommendations for ecologically invasive plants. Wisconsin Dept. Natural Resources, Bureau of Endangered Resources. Madison, Wisconsin. 102pp.
- Invasive Plant Council of New York State
- Jil M. Swearingen, Survey of invasive plants occurring on National Park Service lands, 2000-2007
- Mid-Atlantic Exotic Pest Plant Council, 2005
- New Hampshire Invasive Species Committee. 2005. Guide to Invasive Upland Plant Species in New Hampshire. New Hampshire Department of Agriculture, Markets and Food Plant Industry Division and New Hampshire Invasive Species Committee.
- New Jersey Department of Agriculture, Division of Plant Industry, 2004
- Nonnative Invasive Species in Southern Forest and Grassland Ecosystems
- Vermont Department of Environmental Conservation,
- WeedUS - Database of Plants Invading Natural Areas in the United States
- Alabama Noxious Weeds Class C Noxious Weed
- California Invasive Plant Council
- Connecticut Noxious Weeds
- Apalachicola Invasive Working Group
- Georgia Exotic Pest Plant Council Category 3
- Massachusetts Noxious Weeds
- Maine Noxious Weeds
- Tennessee Exotic Pest Plant Council Significant Threat
- Vermont Noxious Weeds
- Washington Noxious Weeds
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