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Park			Taxon Code
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National Park Service
U.S. Department of the Interior

NPSpecies - Park Species Profile


Polygonum cuspidatum
Japanese knotweed
Johnstown Flood National Memorial
			Record Status: Approved
Occurrence:	Present
Nativeness:	Non-native
Abundance:	Common

Scientific Name with Authority:		Polygonum cuspidatum Siebold & Zucc.
Park Preferred Common Name(s):		Japanese knotweed
Park Synonyms:

Taxonomic Hierarchy:		Kingdom Plantae, Phylum Tracheophyta, Subphylum Spermatophytina, Order Caryophyllales, Family Polygonaceae, Genus Fallopia, Species Polygonum cuspidatum


Management Tags:
Management Priority


Threatened/Endangered Status:
State Species of Concern Status:
Ozone-sensitive Status:
NatureServe Global Rank:
NatureServe State Rank:
Evidence:		0 Observations, 0 Vouchers, 3 Data Store References, 0 External Links


Other Parks Where Species is Listed:
Allegheny Portage Railroad National Historic Site	Apostle Islands National Lakeshore
Big South Fork National River and Recreation Area	Bluestone National Scenic River
Boston Harbor Islands National Recreation Area	Cape Cod National Seashore
Carl Sandburg Home National Historic Site	Chattahoochee River National Recreation Area
Colonial National Historical Park	Cuyahoga Valley National Park
Delaware Water Gap National Recreation Area	Eleanor Roosevelt National Historic Site
Fire Island National Seashore	Fort Donelson National Battlefield
Friendship Hill National Historic Site	Gateway National Recreation Area
Gauley River National Recreation Area	George Washington Memorial Parkway
Home of Franklin D. Roosevelt National Historic Site	Indiana Dunes National Park
Lincoln Boyhood National Memorial	Marsh-Billings-Rockefeller National Historical Park
Martin Van Buren National Historic Site	Minute Man National Historical Park
Morristown National Historical Park	Mount Rainier National Park
New River Gorge National Park and Preserve	North Cascades National Park
Olympic National Park	Oxon Run National Parkway
Petersburg National Battlefield	Prince William Forest Park
Richmond National Battlefield Park	Saint Croix National Scenic Riverway
Saratoga National Historical Park	Saugus Iron Works National Historic Site
Upper Delaware Scenic and Recreational River	Valley Forge National Historical Park
Vanderbilt Mansion National Historic Site	Weir Farm National Historical Park


Last Modified Date:	6/10/2009

NPSpecies - The National Park Service biodiversity database. IRMA Portal version.https://irma.nps.gov/npspecies. Accessed 10/10/2025 6:20:47 AM

NatureServe Global Rank and State Rank

NatureServe. 2017. NatureServe Web Service. Arlington, VA. U.S.A. Available http://services.natureserve.org. Accessed: 12/4/2017. Updated quarterly.

This information is provided by NatureServe (www.natureserve.org) and its network of natural heritage member programs, a leading source of information about rare and endangered species, and threatened ecosystems.


Species Profile	Page 1 of 1	10/10/2025 6:20:47 AM

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