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Polygonum amphibium L.
AMPHIBIOUS BISTORT
Persicaria amphibia; Water knotweed; Polygonum coccineum; Polygonum natans

Life   Plantae   Dicotyledoneae   Polygonaceae   Polygonum

Polygonum amphibium, P. coccineum- Water Smartweed
© Copyright Sheryl Pollock 2011 · 9
Polygonum amphibium, P. coccineum- Water Smartweed

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Polygonum amphibium
© Les Mehrhoff, 2008-2010 · 7
Polygonum amphibium
Polygonum amphibium, Water Smartweed
© Copyright Sheryl Pollock 2011 · 3
Polygonum amphibium, Water Smartweed

Polygonum amphibium
© Les Mehrhoff, 2008-2010 · 1
Polygonum amphibium
Polygonum amphibium
© Copyright Tierney OSullivan 2011 · 1
Polygonum amphibium

Hosts · map
FamilyScientific name @ source (records)
_  flower @ I_SSTO (1)

Associates · map
FamilyScientific name @ source (records)
Dermateaceae  Niptera polygoni @ BPI (2)
Gnomoniaceae  Gnomoniella devexa @ BPI (2)
Mycosphaerellaceae  Mycosphaerella polygoni @ BPI (1)

Ramularia rufomaculans @ BPI (10); 419081B (1); 419081A (1)

Septoria polygonorum @ BPI (1)
Pucciniaceae  Puccinia polygoni-amphibii @ BPI (198); 876073A (1)

Puccinia polygoni @ BPI (3)

Puccinia polygonorum @ BPI (1)
Sclerotiniaceae  Botrytis cinerea @ BPI (1)
Uropyxidaceae  Aecidium polygoni @ BPI (1)
Ustilaginaceae  Ustilago utriculosa @ BPI (2)

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Following modified from Malezas de Mexico, CONABIO
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https://plants.usda.gov/java/profile?symbol=POAM8 ---> http://plants.usda.gov/core/profile?symbol=POAM8
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You are here: Home / Plant Profile

Polygonum amphibium L.
water knotweed

Image of Polygonum amphibium

General Information
Symbol: POAM8
Group: Dicot
Family: Polygonaceae
Duration: Perennial
Growth Habit : Forb/herb
Native Status : AK   N
CAN   N
L48   N
SPM   N
Characteristics
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   

Images

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

Ray Schulenberg. USDA SCS. 1989. Midwest wetland flora: Field office illustrated guide to plant species . Midwest National Technical Center, Lincoln. Provided by USDA NRCS Wetland Science Institute (WSI). Usage Requirements .

Robert H. Mohlenbrock. USDA SCS. 1989. Midwest wetland flora: Field office illustrated guide to plant species . Midwest National Technical Center, Lincoln. Provided by USDA NRCS Wetland Science Institute (WSI). Usage Requirements .

Brother Alfred Brousseau. Provided by St. Mary's College of California . ©St. Mary's College of California. Usage Requirements .

Brother Alfred Brousseau. Provided by St. Mary's College of California . ©St. Mary's College of California. Usage Requirements .

Margaret Williams. Provided by Nevada Native Plant Society . ©Nevada Native Plant Society. Usage Requirements .

Steve Hurst. Provided by ARS Systematic Botany and Mycology Laboratory . United States, NY, Adirondacks. Usage Requirements .

©Jim Stasz. 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 .

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

slideshow

Synonyms

Classification

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 Magnoliopsida – Dicotyledons
Subclass Caryophyllidae
Order Polygonales
Family Polygonaceae – Buckwheat family
Genus Polygonum L. – knotweed
Species Polygonum amphibium L. – water knotweed

Subordinate Taxa

The Plants Database includes the following 2 subspecies of Polygonum amphibium . Click below on a thumbnail map or name for subspecies profiles. Plant is native (blue) Native Plant is introduced Introduced Plant is introduced Native and Introduced Related taxa legend Distribution of <i>
Polygonum amphibium</i>
L. var. <i>
emersum</i>
Michx.
Polygonum amphibium var. emersum
longroot smartweed Distribution of <i>
Polygonum amphibium</i>
L. var. <i>
stipulaceum</i>
Coleman
Polygonum amphibium var. stipulaceum
water smartweed

Legal Status

U.S. Weed Information
Polygonum amphibium water knotweed 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.
SWSS Southern Weed Science Society. 1998. Weeds of the United States and Canada. CD-ROM . Southern Weed Science Society. Champaign, Illinois.

Wetland Status

Interpreting Wetland Status

Related Links

More Accounts and Images
ARS Germplasm Resources Information Network (POAM8)
CalPhotos (POAM8)
Integrated Taxonomic Information System (POAM8)
Jepson Interchange (University of California - Berkeley) (POAM8)
Lady Bird Johnson Wildflower Center Native Plant Information Network (POAM8)
Native American Ethnobotany (University of Michigan - Dearborn) (POAM8)
University of Tennessee Herbarium (Distribution) (POAM8)
University of Washington Burke Museum (POAM8)
University of Wisconsin - Stevens Point Freckmann Herbarium (POAM8)

Wildlife

Food

Source Large Mammals Small Mammals Water Birds Terrestrial Birds
Quinlan Low Low

Cover

Source Large Mammals Small Mammals Water Birds Terrestrial Birds
Quinlan

Sources

Quinlan, S.E., and S. Cuccarese. 2004. Native Alaskan and exotic plants used by wildlife . Alaska Department of Fish and Game. Anchorage.

Description of Values

Value Class Food Cover
High Average 25-50% of diet Regular source of cover
Low 5-10% of diet Infrequently used as cover
Minor 2-5% of diet Sparsely used as cover
Moderate Average 10-25% of diet Occasional source of cover


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Following modified from CalPhotos
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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Polygonum+amphibium&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=Polygonum+amphibium&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant

CalPhotos    
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Number of matches : 10
Query: SELECT * FROM img WHERE ready=1 and taxon like "Polygonum amphibium%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Polygonum amphibium
Polygonum amphibium
Water Smartweed
ID: 0000 0000 0906 0478 [detail]
© 2006 Matt Below

Polygonum amphibium
Polygonum amphibium
Water Smartweed
ID: 0000 0000 0906 0479 [detail]
© 2006 Matt Below

Polygonum amphibium
Polygonum amphibium
Water Smartweed
ID: 0000 0000 0315 1658 [detail]
© 2015 Barry Breckling

Polygonum amphibium
Polygonum amphibium
Water Smartweed
ID: 0000 0000 1010 2091 [detail]
© 2010 Dr.Thomas K. Voekler

Polygonum amphibium
Polygonum amphibium
Water Smartweed
ID: 0000 0000 1010 2092 [detail]
© 2010 Dr.Thomas K. Voekler

Polygonum amphibium
Polygonum amphibium
Water Smartweed
ID: 0000 0000 1010 2093 [detail]
© 2010 Dr.Thomas K. Voekler

Polygonum amphibium
Polygonum amphibium
Water Smartweed
ID: 0000 0000 0315 1659 [detail]
© 2015 Barry Breckling

Polygonum amphibium
Polygonum amphibium
Water Knotweed
ID: 0000 0000 1117 1696 [detail]
© 2017 Thayne Tuason

Polygonum amphibium
Polygonum amphibium
Water Knotweed
ID: 0000 0000 1117 1697 [detail]
© 2017 Thayne Tuason

Polygonum amphibium var. stipulaceum
Polygonum amphibium var. stipulaceum
Water Smartweed
ID: 8266 3261 2621 0014 [detail]
William R. Hewlett
© 1999 California Academy of Sciences

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 © 1995-2019 UC Regents. All rights reserved.

CalPhotos is a project of BNHM      University of California, Berkeley

Following modified from CalPhotos
   Top | See original

http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Polygonum+amphibium+var.+stipulaceum&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=Polygonum+amphibium+var.+stipulaceum&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant

CalPhotos    
Contributors       Log In  
 

Number of matches : 1
Query: SELECT * FROM img WHERE ready=1 and taxon like "Polygonum amphibium var. stipulaceum%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Polygonum amphibium var. stipulaceum
Polygonum amphibium var. stipulaceum
Water Smartweed
ID: 8266 3261 2621 0014 [detail]
William R. Hewlett
© 1999 California Academy of Sciences

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 © 1995-2019 UC Regents. All rights reserved.

CalPhotos is a project of BNHM      University of California, Berkeley

Updated: 2019-10-17 05:33:49 gmt
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