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National Park Service
U.S. Department of the Interior

NPSpecies - Park Species Profile


Polygonum pensylvanicum
Pennsylvania knotweed, Pennsylvania smartweed, pinkweed, pinweed
George Washington Carver National Monument
			Record Status: Approved
Occurrence:	Present
Nativeness:	Native
Abundance:	Uncommon

Scientific Name with Authority:		Polygonum pensylvanicum L.
Park Preferred Common Name(s):
Park Synonyms:

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


Park Tags:
ParkTag -


Threatened/Endangered Status:
State Species of Concern Status:
Ozone-sensitive Status:
NatureServe Global Rank:
NatureServe State Rank:
Evidence:		0 Observations, 0 Vouchers, 5 Data Store References, 0 External Links


Other Parks Where Species is Listed:
Alibates Flint Quarries National Monument	Allegheny Portage Railroad National Historic Site
Antietam National Battlefield	Apostle Islands National Lakeshore
Assateague Island National Seashore	Aztec Ruins National Monument
Bent's Old Fort National Historic Site	Big Bend National Park
Blue Ridge Parkway	Bluestone National Scenic River
Boston Harbor Islands National Recreation Area	Cape Cod National Seashore
Cape Hatteras National Seashore	Chattahoochee River National Recreation Area
Chickamauga and Chattanooga National Military Park	Colonial National Historical Park
Congaree National Park	Cumberland Gap National Historical Park
Cuyahoga Valley National Park	Delaware Water Gap National Recreation Area
Effigy Mounds National Monument	Eisenhower National Historic Site
Fort Donelson National Battlefield	Fort Union Trading Post National Historic Site
Fredericksburg and Spotsylvania County Battlefields Memorial National Military Park	Gateway National Recreation Area
George Washington Birthplace National Monument	Gettysburg National Military Park
Great Sand Dunes National Park and Preserve	Harpers Ferry National Historical Park
Herbert Hoover National Historic Site	Homestead National Historical Park
Hopewell Culture National Historical Park	Hopewell Furnace National Historic Site
Indiana Dunes National Park	Johnstown Flood National Memorial
Kenilworth Park and Aquatic Gardens	Kennesaw Mountain National Battlefield Park
Kings Mountain National Military Park	Lake Meredith National Recreation Area
Little River Canyon National Preserve	Mammoth Cave National Park
Manassas National Battlefield Park	Martin Van Buren National Historic Site
Minute Man National Historical Park	Mississippi National River and Recreation Areas
Missouri National Recreational River	Monocacy National Battlefield
Moores Creek National Battlefield	Morristown National Historical Park
New River Gorge National Park and Preserve	Obed Wild and Scenic River
Ozark National Scenic Riverways	Petrified Forest National Park
Pictured Rocks National Lakeshore	Pipestone National Monument
Prince William Forest Park	Richmond National Battlefield Park
Russell Cave National Monument	Saint Croix National Scenic Riverway
Saint-Gaudens National Historical Park	Saratoga National Historical Park
Shiloh National Military Park	Sleeping Bear Dunes National Lakeshore
Stones River National Battlefield	Tallgrass Prairie National Preserve
Theodore Roosevelt National Park	Upper Delaware Scenic and Recreational River
Valley Forge National Historical Park	Vicksburg National Military Park
Voyageurs National Park	Wilson's Creek National Battlefield


Last Modified Date:	11/9/2004

NPSpecies - The National Park Service biodiversity database. IRMA Portal version.https://irma.nps.gov/npspecies. Accessed 10/13/2025 6:40:16 PM

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	10/13/2025 6:40:16 PM

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