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National Park Service
U.S. Department of the Interior
NPSpecies - Park Species Profile
 
Polygonum arenastrum
common knotweed, doorweed, matweed, ovalleaf knotweed, oval-leaf knotweed, prostrate knotweed
Missouri National Recreational River
   
Record Status: Approved
Occurrence:
Present
Nativeness:
Non-native
Abundance:
Unknown
 
Scientific Name with Authority:
Polygonum arenastrum Boreau
Park Preferred Common Name(s):
 
Park Synonyms:
 
 
Taxonomic Hierarchy:
Kingdom Plantae, Phylum Tracheophyta, Subphylum Spermatophytina, Order Caryophyllales, Family Polygonaceae, Genus Polygonum, Species Polygonum arenastrum
Park Tags:
ParkTag -
Threatened/Endangered Status:
 
State Species of Concern Status:
 
Ozone-sensitive Status:
 
NatureServe Global Rank:
G5?
NatureServe State Rank:
NE: SNA; SD: SNA
Evidence:
0 Observations, 0 Vouchers, 2 Data Store References, 0 External Links
Other Parks Where Species is Listed:
 
Acadia National Park
Agate Fossil Beds National Monument
Apostle Islands National Lakeshore
Bent's Old Fort National Historic Site
Black Canyon of the Gunnison National Park
Cabrillo National Monument
Cape Hatteras National Seashore
Channel Islands National Park
Curecanti National Recreation Area
Denali National Park and Preserve
Eugene O'Neill National Historic Site
Florissant Fossil Beds National Monument
Gateway National Recreation Area
Grand Portage National Monument
Grant-Kohrs Ranch National Historic Site
Great Basin National Park
Homestead National Historical Park
Hopewell Furnace National Historic Site
Indiana Dunes National Park
John Muir National Historic Site
Lake Meredith National Recreation Area
Manassas National Battlefield Park
Mesa Verde National Park
Mississippi National River and Recreation Areas
Olympic National Park
Rocky Mountain National Park
Saint Croix National Scenic Riverway
Sequoia and Kings Canyon National Parks
Theodore Roosevelt National Park
Voyageurs National Park
Wrangell - St Elias National Park and Preserve
Yosemite National Park
Yukon-Charley Rivers National Preserve
 
Last Modified Date:
4/12/2006
 
NPSpecies - The National Park Service biodiversity database. IRMA Portal version.https://irma.nps.gov/npspecies. Accessed 10/13/2025 9:01:41 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
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10/13/2025 9:01:41 AM