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National Park Service
U.S. Department of the Interior

NPSpecies - Park Species Profile


Amaranthus retroflexus
Pigweed
Whitman Mission National Historic Site
			Record Status: Approved
Occurrence:	Present
Nativeness:	Non-native
Abundance:	Uncommon

Scientific Name with Authority:		Amaranthus retroflexus L.
Park Preferred Common Name(s):		Pigweed
Park Synonyms:

Taxonomic Hierarchy:		Kingdom Plantae, Phylum Tracheophyta, Subphylum Spermatophytina, Order Caryophyllales, Family Amaranthaceae, Genus Amaranthus, Species Amaranthus retroflexus


Park Tags:
ParkTag -


Threatened/Endangered Status:
State Species of Concern Status:
Ozone-sensitive Status:
NatureServe Global Rank:		G5
NatureServe State Rank:		WA: SNA
Evidence:		0 Observations, 1 Vouchers, 2 Data Store References, 0 External Links


Other Parks Where Species is Listed:
Acadia National Park	Agate Fossil Beds National Monument
Anacostia Park	Apostle Islands National Lakeshore
Arches National Park	Badlands National Park
Bandelier National Monument	Bent's Old Fort National Historic Site
Big Bend National Park	Bighorn Canyon National Recreation Area
Boston Harbor Islands National Recreation Area	Buffalo National River
Canyon De Chelly National Monument	Canyonlands National Park
Capitol Reef National Park	Carlsbad Caverns National Park
Chamizal National Memorial	Chickasaw National Recreation Area
City Of Rocks National Reserve	Craters of the Moon National Monument and Preserve
Curecanti National Recreation Area	Cuyahoga Valley National Park
Delaware Water Gap National Recreation Area	Devils Tower National Monument
Effigy Mounds National Monument	Eugene O'Neill National Historic Site
Fire Island National Seashore	First State National Historical Park
Florissant Fossil Beds National Monument	Fort Laramie National Historic Site
Fort Larned National Historic Site	Fort Union Trading Post National Historic Site
Gateway National Recreation Area	George Washington Birthplace National Monument
George Washington Carver National Monument	George Washington Memorial Parkway
Glacier National Park	Glen Canyon National Recreation Area
Grand Canyon National Park	Grand Teton National Park
Grant-Kohrs Ranch National Historic Site	Great Sand Dunes National Park and Preserve
Great Smoky Mountains National Park	Guadalupe Mountains National Park
Hagerman Fossil Beds National Monument	Harpers Ferry National Historical Park
Homestead National Historical Park	Hopewell Culture National Historical Park
Hopewell Furnace National Historic Site	Hovenweep National Monument
Indiana Dunes National Park	Jewel Cave National Monument
John Muir National Historic Site	Knife River Indian Villages National Historic Site
Lake Clark National Park and Preserve	Lake Meredith National Recreation Area
Lake Roosevelt National Recreation Area	Lava Beds National Monument
Mammoth Cave National Park	Marsh-Billings-Rockefeller National Historical Park
Martin Van Buren National Historic Site	Mesa Verde National Park
Minute Man National Historical Park	Missouri National Recreational River
Monocacy National Battlefield	Natural Bridges National Monument
Navajo National Monument	Nez Perce National Historical Park
North Cascades National Park	Ozark National Scenic Riverways
Petrified Forest National Park	Pinnacles National Park
Pipe Spring National Monument	Pipestone National Monument
Rocky Mountain National Park	Russell Cave National Monument
Sagamore Hill National Historic Site	Saint Croix National Scenic Riverway
Salinas Pueblo Missions National Monument	Santa Monica Mountains National Recreation Area
Saratoga National Historical Park	Scotts Bluff National Monument
Sequoia and Kings Canyon National Parks	Sleeping Bear Dunes National Lakeshore
Sunset Crater Volcano National Monument	Tallgrass Prairie National Preserve
Theodore Roosevelt National Park	Timpanogos Cave National Monument
Upper Delaware Scenic and Recreational River	Valles Caldera National Preserve
Voyageurs National Park	Walnut Canyon National Monument
White Sands National Park	Wind Cave National Park
Yellowstone National Park	Yucca House National Monument
Zion National Park


Last Modified Date:	9/19/2005

NPSpecies - The National Park Service biodiversity database. IRMA Portal version.https://irma.nps.gov/npspecies. Accessed 10/8/2025 4:01:20 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	10/8/2025 4:01:20 PM

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