Potamogeton crispus L.
Curly-leaved pondweed; Curled Pondweed; Curlyleaf Pondweed
Life   Plantae   Monocotyledoneae   Potamogetonaceae   Potamogeton

http://www.discoverlife.org/nh/id/20q/Grasses.xml ---> https://www.discoverlife.org/nh/id/20q/Grasses.xml

80x5 - 240x3 - 240x4 - 320x1 - 320x2 - 320x3 - 640x1 - 640x2
Set display option above.
Click on image to enlarge.
Potamogeton crispus
© Les Mehrhoff, 2008-2010 · 1
Potamogeton crispus

Associates · map
FamilyScientific name @ source (records)
_  Papulaspora aspera @ BPI (1)

go to Discover Life's Facebook group

Following modified from Washington State Department of Ecology
   Top | See original

http://www.ecy.wa.gov/programs/wq/plants/plantid2/descriptions/potcri.html ---> https://www.ecy.wa.gov/programs/wq/plants/plantid2/descriptions/potcri.html
https://www.ecy.wa.gov/programs/wq/plants/plantid2/descriptions/potcri.html ---> https://ecology.wa.gov/programs/wq/plants/plantid2/descriptions/potcri.html
&pull 20q v5.145 20180528: Error 404 Not Found https://ecology.wa.gov/programs/wq/plants/plantid2/descriptions/potcri.html

Following modified from Flora of Taiwan, National Taiwan University
   Top | See original

&pull 20q v5.145 20180528: Error 404 Not Found http://tai2.ntu.edu.tw/udth/bin/fot1.exe/browse?bid=5&page=21

Following modified from Taiwan Biodiversity National Information Network
   Top | See original

Kingdom Plantae  
 Phylum Tracheophyta  
 Class Magnoliopsida  
 Order Alismatales  
 Family Potamogetonaceae  
 Genus Potamogeton  
  Potamogeton crispus    L. 
Provider: Ching-I Peng 
hierarchy tree    download xml    download txt    Chinese Page    
Citation: Flora of Taiwan 2nd ed. 5: 21, 2000
Name Code: 201878
Suggested Link    Discover Life    Flora of Taiwan 2nd eBooks (National Taiwan University)    Global Invasive Species Database (GISD)  
User Response:   upload Comments    upload Photo
2010-11-12 U/L
Previous Page       Home Page

Following modified from Plants Database, United States Department of Agriculture
   Top | See original

http://plants.usda.gov/java/profile?symbol=POCR3 ---> https://plants.usda.gov/java/profile?symbol=POCR3
https://plants.usda.gov/java/profile?symbol=POCR3 ---> http://plants.usda.gov/core/profile?symbol=POCR3
http://plants.usda.gov/core/profile?symbol=POCR3 ---> https://plants.usda.gov/core/profile?symbol=POCR3
Link: Skip repetitive navigation links
USDA and NRCS Identifier NRCS Logo
USDA.gov Web Site PLANTS photo banner
PLANTS Home  about PLANTS  PLANTS Team  Partners of PLANTS  What  National Plant Data Team Web Site  Help using PLANTS  Contact PLANTS
 Search the PLANTS Web site
 Name Search

 State Search
 Advanced Search
 Search Help
 Alternative Crops
 Cover Crops
 Culturally Significant
 Distribution Update
 Fact Sheets & Plant Guides
 Introduced, Invasive, and Noxious Plants
 Threatened & Endangered
 Wetland Indicator Status
PLANTS Image Gallery
 50,000+ Plant Images
Download PLANTS data
 Complete PLANTS Checklist
 State PLANTS Checklist
 Advanced Search Download
 Symbols for Unknown Plants
 NRCS State GSAT Lists
 NRCS State Plants Lists
Related tools
 Crop Nutrient Tool
 Ecological Site Information System
 PLANTS Identification Keys
 Plant Materials Web Site
 Plant Materials Publications
 USDA Plant Hardiness Map
You are here: Home / Plant Profile

Potamogeton crispus L.
curly pondweed

Image of Potamogeton crispus

General Information
Symbol: POCR3
Group: Monocot
Family: Potamogetonaceae
Duration: Perennial
Growth Habit : Forb/herb
Native Status : CAN   I
L48   I
Plant Guide (pdf) (doc)
Data Source and Documentation
About our new maps
Plants-NRCS Logos
green round image for nativity Native blue round image for introduced Introduced ocre round image for introduced and nativity Both white round image for no status Absent/Unreported
image for native, but no county data Native, No County Data image for introduced, but no county data Introduced, No County Data both introduced and native, but no county data Both, No County Data
Native Status:
lower 48 status L48    Alaska status AK    Hawaii status HI    Puerto Rico status PR    Virgin Islands status VI    Navassa Island NAV    Canada status CAN    Greenland status GL    Saint Pierre and Michelon status SPM    North America NA   


click on a thumbnail to view an image, or see all the Potamogeton thumbnails at the Plants Gallery

Robert H. Mohlenbrock. USDA NRCS. 1995. Northeast wetland flora: Field office guide to plant species . Northeast National Technical Center, Chester. Provided by USDA NRCS Wetland Science Institute (WSI). Usage Requirements .

Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. 3 vols. Charles Scribner's Sons, New York. Vol. 1: 81. Provided by Kentucky Native Plant Society . Scanned by Omnitek Inc . Usage Requirements .

USDA NRCS. Wetland flora: Field office illustrated guide to plant species. USDA Natural Resources Conservation Service. Provided by NRCS National Wetland Team . Usage Requirements .




Click on a scientific name below to expand it in the PLANTS Classification Report.
Rank Scientific Name and Common Name
Kingdom Plantae – Plants
Subkingdom Tracheobionta – Vascular plants
Superdivision Spermatophyta – Seed plants
Division Magnoliophyta – Flowering plants
Class Liliopsida – Monocotyledons
Subclass Alismatidae
Order Najadales
Family Potamogetonaceae – Pondweed family
Genus Potamogeton L. – pondweed
Species Potamogeton crispus L. – curly pondweed

Subordinate Taxa

This plant has no children

Legal Status

Noxious Weed Information
This plant is listed by the U.S. federal government or a state. Common names are from state and federal lists. Click on a place name to get a complete noxious weed list for that location, or click here for a composite list of all Federal and State Noxious Weeds .
Alabama curlyleaf pondweed Class C noxious weed
Connecticut crispy-leaved pondweed Invasive, banned
Maine curly pondweed Invasive aquatic plant
Massachusetts crisped pondweed, curly pondweed Prohibited
Vermont curly leaf pondweed Class B noxious weed
Washington crisped pondweed, curly pondweed Class C noxious weed
U.S. Weed Information
Potamogeton crispus curly pondweed curly-leaved pondweed This plant can be weedy or invasive according to the authoritative sources noted below.This plant may be known by one or more common names in different places, and some are listed above. Click on an acronym to view each weed list, or click here for a composite list of Weeds of the U.S.
STATE Assorted authors. State noxious weed lists for 46 states . State agriculture or natural resource departments.
Cal-IPC California Invasive Plant Council. 2006. California Invasive Plant Inventory. Cal-IPC Publication 2006-02 (1 February 2007). California Invasive Plant Council. Berkeley, California.
SEEPPC Southeast Exotic Pest Plant Council. 1996. Invasive exotic pest plants in Tennessee (19 October 1999). Research Committee of the Tennessee Exotic Pest Plant Council. Tennessee.
WI Hoffman, R.and K. Kearns (eds.). 1997. Wisconsin manual of control recommendations for ecologically invasive plants . Wisconsin Dept. Natural Resources. Madison, Wisconsin.

Wetland Status

Interpreting Wetland Status

North America
Arid West OBL
Atlantic and Gulf Coastal Plain OBL
Eastern Mountains and Piedmont OBL
Great Plains OBL
Midwest OBL
Northcentral & Northeast OBL
Western Mountains, Valleys, and Coast OBL

Related Links

More Accounts and Images
ARS Germplasm Resources Information Network (POCR3)
CalPhotos (POCR3)
Flora of North America (POCR3)
Integrated Taxonomic Information System (POCR3)
Jepson Interchange (University of California - Berkeley) (POCR3)
USF Atlas of Florida Vascular Plants (POCR3)
University of Tennessee Herbarium (Distribution) (POCR3)
University of Wisconsin - Stevens Point Freckmann Herbarium (POCR3)
Related Websites
CT-USDA NRCS Invasive Species Identification Sheets (POCR3)
Environment Canada, Canadian Wildlife Service: abstract & illustration (POCR3)
Invasive Plant Atlas of New England (POCR3)
Minnesota Department of Natural Resources: identifying exotic aquatic macrophytes (images) (POCR3)
Swedish Virtual Flora: images & text (in Swedish) (POCR3)



Source Large Mammals Small Mammals Water Birds Terrestrial Birds


Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Description of Values

Value Class Food Cover

 PLANTS Home | USDA.gov | NRCS | Site Map | Policies and Links
Accessibility Statement | Privacy Policy | Non-Discrimination Statement

Following modified from Flora of North America
   Top | See original

Link to Flora of North America home
All Floras       Advanced Search
FNA Vol. 22 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 22 | Potamogetonaceae | Potamogeton

23. Potamogeton crispus Linnaeus, Sp. Pl. 1: 126. 1753 (as crispum).

Curled pondweed, potamot crepu

Rhizomes absent. Cauline stems flattened, without spots, to 100 cm; nodal glands absent. Turions common, axillary or terminal, 1.5--3 ´ ca. 2 cm, hard; leaves ± 2-ranked; outer leaves 1--4 per side, base not corrugate, apex rounded; inner leaves rolled into linear, terete structure, oriented parallel to outer leaves. Leaves submersed, ± spirally arranged, sessile, lax; stipules persistent to deliquescent, inconspicuous, convolute, free from blade, brownish, not ligulate, to 0.5 cm, not fibrous, not shredding at tip, apex obtuse; blade light to dark green, linear, not arcuate, 1.2--9 cm ´ 4--10 mm, base obtuse to rounded, without basal lobes, not clasping to nearly clasping, margins conspicuously serrate, not crispate, apex not hoodlike, round to round-acute, lacunae in 2--5 rows each side of midrib; veins 3--5. Inflorescences unbranched, emersed; peduncles not dimorphic, terminal or rarely axillary, erect to ascending, cylindric, 2.5--4 cm; spikes not dimorphic, cylindric, 10--15 mm. Fruits sessile, red to reddish brown, obovoid, turgid to slightly concave, not abaxially or laterally keeled, 6 ´ 2.5 mm; beak apically recurved, 2--3 mm; sides without basal tubercles; embryo with 1 full spiral. 2n = 52 (Europe).

Flowering spring--summer. Quiet waters, especially brackish, alkaline, or eutrophic waters of ponds, lakes, and streams; 0--2000 m; introduced; Alta., B.C., Ont., Que., Sask.; Ala., Ariz., Ark., Calif., Conn., Del., D.C., D.C., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Mo., Nebr., Nev., N.H., N.J., N.Y., N.C., Ohio, Okla., Oreg., Pa., R.I., S.Dak., Tenn., Tex., Utah, Vt., Va., Wash., W.Va., Wis., Wyo.; Central America (Costa Rica); South America (Colombia, and Argentina); Eurasia; Australia.

No specimens have been seen from New Brunswick, but the species is to be expected there.

Potamogeton crispus, an introduced species, has spread throughout much of North America. The expansion of this species's range from its original collection in North America, apparently about 1840, has been discussed (R. L. Stuckey 1979). This is the only species of pondweeds in North America with serrate leaves and consequently it is easily recognized.

Life history of Potamogeton crispus is unusual as it flowers and fruits in late spring and early summer, at which time it also produces turions. The plants decay shortly after those structures develop, leaving only fruits and turions, which survive the summer. No one has observed any seed germination, but the turions (referred to as dormant apices) germinate in late summer or fall, and the plants overwinter as small plants only a few cm centimeters in size, even under the ice in northern climates (R. L. Stuckey et al. 1978). Growth then continues as the water begins warming in the spring.

One hybrid, Potamogeton crispus ´ P. praelongus (= P. ´ undulatus Wolfgang ex Schultes & Schultes f.), has been described.


Sastroutomo, S. S. 1981. Turion formation, dormancy and germination of curly pondweed, Potamogeton crispus L. Aquatic Bot. 10: 161--173. Stuckey, R. L. 1979. Distributional history of Potamogeton crispus (curly pondweed) in North America. Bartonia 46: 22--42. Stuckey, R. L., J. R. Wehrmeister, and R. J. Bartolotta. 1978. Submersed aquatic vascular plants in ice-covered ponds of central Ohio. Rhodora 80: 203--208. One hybrid, Potamogeton crispus ´ P. praelongus (= P. ´ undulatus Wolfgang ex Schultes & Schultes f.), has been described.

Following modified from CalPhotos
   Top | See original

http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Potamogeton+crispus&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Potamogeton+crispus&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant

Contributors       Log In  

Number of matches : 6
Query: SELECT * FROM img WHERE ready=1 and taxon like "Potamogeton crispus%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Potamogeton crispus
Potamogeton crispus
Crispate-leaved Pondweed
ID: 6246 3041 2861 0069 [detail]
© 1995 Saint Mary's College of California

Potamogeton crispus
Potamogeton crispus
Crispate-leaved Pondweed
ID: 6246 3041 2861 0068 [detail]
© 1995 Saint Mary's College of California

Potamogeton crispus
Potamogeton crispus
Crisp-leaved Pondweed
ID: 0000 0000 1115 2471 [detail]
© 2015 Neal Kramer

Potamogeton crispus
Potamogeton crispus
Crisp-leaved Pondweed
ID: 0000 0000 1115 2472 [detail]
© 2015 Neal Kramer

Potamogeton crispus
Potamogeton crispus
Crisp-leaved Pondweed
ID: 0000 0000 1115 2473 [detail]
© 2015 Neal Kramer

Potamogeton crispus
Potamogeton crispus
Crisp-leaved Pondweed
ID: 0000 0000 0216 0077 [detail]
© 2016 Neal Kramer

Using these photos: A variety of organizations and individuals have contributed photographs to CalPhotos. Please follow the usage guidelines provided with each image. Use and copyright information, as well as other details about the photo such as the date and the location, are available by clicking on the [detail] link under the thumbnail. See also: Using the Photos in CalPhotos .   

Copyright © 1995-2018 UC Regents. All rights reserved.

CalPhotos is a project of BNHM      University of California, Berkeley

Updated: 2019-01-20 16:01:14 gmt
Discover Life | Top
© Designed by The Polistes Corporation