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National Park Service
U.S. Department of the Interior

NPSpecies - Park Species Profile


Triodanis perfoliata
clasping bellwort, clasping Venus' lookingglass, clasping Venus' looking-glass, clasping-leaf Venus' looking-glass, common Venus' lookingglass, roundleaved triodanis
Sleeping Bear Dunes National Lakeshore
			Record Status: Approved
Occurrence:	Probably Present
Nativeness:	Native
Abundance:

Scientific Name with Authority:		Triodanis perfoliata (L.) Nieuwl.
Park Preferred Common Name(s):
Park Synonyms:

Taxonomic Hierarchy:		Kingdom Plantae, Phylum Tracheophyta, Subphylum Spermatophytina, Order Asterales, Family Campanulaceae, Genus Triodanis, Species Triodanis perfoliata


Park Tags:
ParkTag -


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


Other Parks Where Species is Listed:
Amistad National Recreation Area	Appalachian National Scenic Trail
Assateague Island National Seashore	Big South Fork National River and Recreation Area
Blue Ridge Parkway	Bluestone National Scenic River
Cape Cod National Seashore	Cape Hatteras National Seashore
Cape Lookout National Seashore	Carl Sandburg Home National Historic Site
Catoctin Mountain Park	Chickamauga and Chattanooga National Military Park
Chickasaw National Recreation Area	Chiricahua National Monument
Colonial National Historical Park	Coronado National Memorial
Cowpens National Battlefield	Cumberland Gap National Historical Park
Cumberland Island National Seashore	Delaware Water Gap National Recreation Area
Devils Tower National Monument	Effigy Mounds National Monument
Eisenhower National Historic Site	Fire Island National Seashore
First State National Historical Park	Fort Bowie National Historic Site
Fort Caroline National Memorial	Fort Donelson National Battlefield
Fort Larned National Historic Site	Fort Matanzas National Monument
Fort Pulaski National Monument	Fort Sumter National Historical Park
Gateway National Recreation Area	George Washington Birthplace National Monument
George Washington Carver National Monument	Gettysburg National Military Park
Gila Cliff Dwellings National Monument	Great Falls Park
Great Smoky Mountains National Park	Gulf Islands National Seashore
Harpers Ferry National Historical Park	Home of Franklin D. Roosevelt National Historic Site
Homestead National Historical Park	Hopewell Culture National Historical Park
Hopewell Furnace National Historic Site	Indiana Dunes National Park
Jean Lafitte National Historical Park and Preserve	Kennesaw Mountain National Battlefield Park
Lincoln Boyhood National Memorial	Lyndon B. Johnson National Historical Park
Mammoth Cave National Park	Manassas National Battlefield Park
Minute Man National Historical Park	Mississippi National River and Recreation Areas
Mount Rushmore National Memorial	New River Gorge National Park and Preserve
Nez Perce National Historical Park	Obed Wild and Scenic River
Ocmulgee Mounds National Historical Park	Organ Pipe Cactus National Monument
Ozark National Scenic Riverways	Padre Island National Seashore
Petersburg National Battlefield	Prince William Forest Park
Richmond National Battlefield Park	Rock Creek Park
Rocky Mountain National Park	Russell Cave National Monument
Sagamore Hill National Historic Site	Saguaro National Park
Saint Croix National Scenic Riverway	Saratoga National Historical Park
Shenandoah National Park	Shiloh National Military Park
Stones River National Battlefield	Tallgrass Prairie National Preserve
Timucuan Ecological and Historic Preserve	Tumacacori National Historical Park
Upper Delaware Scenic and Recreational River	Valley Forge National Historical Park
Vanderbilt Mansion National Historic Site	Vicksburg National Military Park
Wilson's Creek National Battlefield	Wind Cave National Park
Wolf Trap National Park for the Performing Arts	Zion National Park


Last Modified Date:	9/27/2005

NPSpecies - The National Park Service biodiversity database. IRMA Portal version.https://irma.nps.gov/npspecies. Accessed 3/4/2026 5:30:55 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	3/4/2026 5:30:55 PM

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